I didn't say it was brilliant - I said it was simple and would work. 20% was a number pulled out of my ass that could easily be adjusted whatever the numbers happen to be. I grabbed a number and gave the source. What is the real number - $8.4 billion? You already have it somewhere apparently, so if I assume you know middle school algebra, you should be able to tell us the rate needed to reach the same level of revenue using my system.
edit: Not that I doubt your ability to do basic math, but... If the true taxable value is $8.23 trillion and the required taxation rate goes to 34.87% to raise the same revenue, this simple plan still gives the following results for rates:
In other words, it's better for everyone except the guys with really high income, and they end up the same as before (except before they were making their money from capital gains, taxed at a lower rate, minus crazy deductions, right?). So, with all the loopholes gone and no more 15% capital gains rate, we would see higher revenues by a lot using this method.
edit #2: Here are the actual total tax rates for a given income level using the same assumptions as before.
Raw Income Current Proposed
$5,000.00 6.2% 0.0%
$10,000.00 10.5% 0.0%
$14,200.00 12.2% 0.0%
$18,077.00 14.1% 0.0%
$30,000.00 16.9% 13.9%
$40,200.00 18.0% 19.2%
$50,000.00 23.2% 22.3%
$60,000.00 24.5% 24.4%
$70,000.00 25.5% 25.9%
$80,000.00 26.2% 27.0%
$89,300.00 26.7% 27.8%
$100,000.00 36.1% 28.6%
$250,000.00 42.2% 32.3%
$500,000.00 49.6% 33.6%
$750,000.00 44.7% 34.0%
$1,000,000.00 42.3% 34.2%
$5,000,000.00 36.5% 34.7%
$10,000,000.00 35.7% 34.8%
$50,000,000.00 35.1% 34.9%
$100,000,000.00 35.1% 34.9%
$500,000,000.00 35.0% 34.9%
$1,000,000,000.00 35.0% 34.9%