ItaxN, this is fascinating. It talks about the top marginal tax rate both now and how it compares historically.
the top marginal tax rate is now higher than it was under Reagan, but lower than it was under Clinton, and much lower than it's been at various other points in history. (The average top marginal tax rate since the income tax was established is 60 percent).
What the discussion over the top marginal tax rate ignores, however (and what Ygelsias picks up upon) is that this rate has been assessed at very different thresholds of income. In 1940, for example, the top marginal tax rate was 81.1 percent -- but this rate only kicked in once you made $5,000,000 or more in income, which is equivalent to about $75,000,000 in today's dollars.
But today, the threshold where the top tax bracket kicks in isn't $75 million, or $5 million, or even $1 million ... it's a mere $357,700. The progressivity of the tax code stops there...
The question, of course, is why there isn't a millionaires tax bracket now ... or even a multi-millionaires tax bracket. I haven't run the numbers, but I'm guessing that if you established a new tax bracket at, say, 40.5 percent, that started at incomes of $1,000,000 or more, this would bring in as much revenue to the government as restoring the $250K tax bracket (which is really $360K now given indexing to inflation) to 39.6 percent, as it was under Clinton.