Mellon cited statistics that showed the opposite of what the high-tax advocates claimed. Although incomes in general were rising from 1916 to 1921, the taxable income of people earning $300,000 and up dropped by about four-fifths.
That didn't mean that "the rich" were becoming poor. It meant that they had arranged to receive their incomes in forms that were not taxable. Mellon asked where the money of these high income earners went. He answered: "There is no doubt of the fact that much of it went into tax-exempt securities." In today's global economy, much of it can also easily be sent overseas -- much more easily than workers can go overseas to get the jobs this money creates in other countries.
After Mellon finally succeeded in getting Congress to lower the top tax rate from 73 percent to 24 percent, the government actually received more tax revenues at the lower rate than it had at the higher rate. Moreover, it received a higher proportion of all income taxes from the top income earners than before.
Something similar happened in later years, after tax rates were cut under Presidents Kennedy, Reagan and G.W. Bush. The record is clear. Barack Obama admitted during the 2008 election campaign that he understood that raising tax rates does not necessarily mean raising tax revenues.
Why then is he pushing so hard for higher tax rates on "the rich" this election year? Because class warfare politics can increase votes for his reelection, even if it raises no more tax revenues for the government.