In Thomas Stanley and William Danko's research for The Millionaire Next Door (1996), physicians were among the highest-paid people studied. They were also among the worst at building wealth. For every doctor who had accumulated far more than their income would predict, two had accumulated far less.
That's a strange finding, until you look at what a salary actually is. A salary is money that arrives. Wealth is money that stays. The two are related, but they're not the same thing. The surveys of millionaires keep finding that the second depends much less on the first than most of us assume.
Here's what the research says about why big salaries don't decide who builds wealth, what it can't prove, and what decides it instead.
Two doctors, one income
Stanley and Danko's best-known example is a pair of physicians they called Dr. North and Dr. South. Both earned about the same, around $700,000 a year in the mid-1990s. Both had spent years in training, started earning late, and worked long hours. Both faced the same pressure that comes with the title. The neighborhood, the cars, the clubs, the expectation that a doctor lives a certain way.
One of them had built a fortune. Dr. North had set money aside for years, tracked it, and let it grow into millions. The other, on the same income, had a net worth of a few hundred thousand dollars. Dr. South spent what came in, on the house and the cars and the memberships. He had almost nothing that would keep paying if the paycheck stopped.
Same profession, same city, same salary, decades apart in wealth. The income didn't decide it. What each of them did with the income did.
What a windfall does, measured properly
If salary decided wealth, a sudden pile of money should make people wealthier. Economists have tested that with the cleanest experiment available: the lottery.
In 2011, Scott Hankins, Mark Hoekstra, and Paige Marta Skiba studied Florida lottery winners. They compared people who won $50,000 to $150,000 with people who won small amounts. Because the size of a prize is random, the two groups were alike in every way except the money. The big winners were half as likely to go bankrupt in the two years after winning. Then it reversed. Three to five years on, they were more likely to file. By the end, the two groups had gone bankrupt at about the same rate. When the big winners did file, they had about the same assets and the same debts as the small winners. The money hadn't stayed.
That's one study, in one state, among people who were already in some financial trouble. It doesn't say windfalls are useless. It says that money arriving doesn't, by itself, become money kept. Something has to catch it.
What the surveys say
The millionaire surveys point the same way from the other side.
In Ramsey Solutions' 2017–2018 study of more than 10,000 U.S. millionaires, only 31% had averaged $100,000 a year over their careers. A third never earned six figures in any single year. Most of them built a million on pay that would never have impressed anyone.
Stanley and Danko looked at high earners, roughly $100,000 a year and up in their day. The ones who built the most wealth were often in the least glamorous work: welding contractors, auctioneers, paving contractors. The professionals with the largest incomes were frequently the ones who'd kept the least. They coined a phrase for it. Some people are income-statement affluent: they look rich because of what comes in. Others are balance-sheet affluent: they are rich because of what they've kept.
Both groups exist at every salary. That's the finding underneath all the others.
What the research can't say
None of this means pay doesn't matter. It matters more than any single habit, in one specific way: a higher salary makes every habit easier. Two people saving the same share of their pay will end up in different places if one earns three times as much. And on a truly low income, there may be nothing left to save at all. No habit fixes a paycheck that doesn't cover rent.
The doctor stories are case studies, not statistics. Stanley and Danko chose them to make a point, and the names are invented. The lottery study is strong precisely because the money was random. But it studied people who'd already bought lottery tickets, in a state with high bankruptcy rates, so it may not describe everyone.
And every survey of millionaires hears only from people who reached a million. Someone who earned a modest salary, kept the gap, and was stopped by illness or a layoff doesn't appear. The surveys can show that salary didn't decide who got there. They can't show it never mattered.
What it means for you
If you've been waiting for a raise, a better job, or a bigger year before you start building anything, the research is worth sitting with. The people who built wealth on ordinary pay didn't wait. And the people who earned a great deal and kept none of it show what waiting looks like at any income. The money arrives, and then it goes.
Your salary sets the size of what's possible. It doesn't set what happens. That part is yours, at whatever number you're at.
The habit underneath the number
The habit that separates Dr. North from Dr. South is the one every survey finds. Keep your lifestyle below your income.
Ninety-four percent of the millionaires in Ramsey's study said they live on less than they make. Stanley and Danko's balance-sheet-affluent households did the same thing for decades, in the same homes, often in the same cars. The gap between what came in and what went out was where the wealth came from, at $50,000 a year and at $700,000.
The arithmetic is easy. The hard part is that spending rises to meet income unless something stops it. A raise arrives, life expands to fill it, and a year later the gap is the same size it was before. Dr. South's income was enormous. His gap was nearly zero.
The rule that makes it stick
The rule that holds the gap open is decide before the money arrives.
Every raise, bonus, and windfall is easiest to keep in the moment before you have it. Decide now what share of the next raise goes to savings or investing. Set it up so it moves before the new amount reaches your account. The lottery winners had no such rule; the money landed and life absorbed it. The millionaires in the surveys mostly did have one, even if they never called it that.
This week: if a raise, bonus, or tax refund is coming in the next year, write down now what share you'll keep and where it will go. Then set up the transfer today, for the day it lands. If nothing is coming, decide the share of your current pay instead and set that. Even a small share counts. It's done when it runs without you. If a month goes wrong, restart on the next payday.
In short
- Among the highest earners Stanley and Danko studied, physicians were twice as likely to have built far less wealth than their income predicted as far more.
- Lottery winners of $50,000 to $150,000 went bankrupt at the same rate as small winners within a few years. The money didn't stay.
- A third of the millionaires in the largest U.S. survey never earned six figures in a year.
- A salary sets the size of what's possible. The gap between earning and spending decides what happens.
- The rule: decide before the money arrives.
The keep: deciding in advance costs you one clear-eyed minute with your next raise. It gives you back the raise.
For education only, not financial advice. Returns are never guaranteed.
Sources
- Thomas J. Stanley and William D. Danko, The Millionaire Next Door (1996): physicians' accumulation (one prodigious accumulator for every two under-accumulators); the Dr. North and Dr. South case study (pseudonyms; both about $700,000 a year); income-statement versus balance-sheet affluence; the high-earner occupations. Evidence: moderate; dated; the doctor pair is illustrative, not statistical.
- Scott Hankins, Mark Hoekstra, and Paige Marta Skiba, "The Ticket to Easy Street? The Financial Consequences of Winning the Lottery," Review of Economics and Statistics 93, no. 3 (2011): Florida winners of $50,000–$150,000 versus small winners; half as likely to file for bankruptcy within two years, more likely three to five years later; similar assets and debts at filing. Evidence: strong for its population.
- Ramsey Solutions, The National Study of Millionaires, fielded Nov 2017 to Jan 2018, more than 10,000 U.S. millionaires: 31% averaged $100,000+; one-third never earned six figures in a year; 94% live on less than they make. Self-reported. Evidence: low to moderate.
The Selfmade Newsletter: one idea every Friday on what self-made people do differently. Free, on Substack. Join here.
