There is a chart in this article which shows what I am trying to tell you.
When there was a 94% top rate in 1944-45, there were so many deductions and exclusions that the taxable income was not comparable to someone’s entire income. First, the top rate started at $200,000, which today is equal to $2,413,059.90 — so the maximum EMTR would apply only to incomes of $2.5 million. But, that’s still taxable income, not earned income.
In 1944, you could deduct business meals, all business travel, all forms of interest payments, and much more. You could even deduct spousal travel expenses on a business trip! (Why travel alone?) Companies could also “loan” or “provide” almost anything to an employee, from an apartment to standard benefits. It was possible to shelter tens of thousands of dollars from taxable income. Three-martini lunches and expense accounts were important realities, skewing tax calculations.
As a result of deductions and exclusions, even the theoretical maximum Real Rate of taxation at 60% in 1944 overstates taxation dramatically. The reality? On earned income, the richest U.S. taxpayers paid close to 40 percent of their earned incomes in taxes in 1944. We simply didn’t count much of the compensation as taxable income.