How about a progressive rate on CORPORATIONS?
50K or below: 0%
above 50K-250K: flat 15%.
above 250K-1M: 20%.
above 1M-10M: 25%
above 10M-100M:30%
above 100M-500M:37.5%
above 500M:42.5%
Individual tax rates will be exactly the same. No marriage penalties or benefits to the tax code.
EDIT:
For individuals, all (college-level) education tuition (tuition only) costs and medical bills can cover income as an expense for a period of 15 years from the initial purchase; the amount expensed for the current year can be chosen freely from remaining credits.
No other federal income tax deductions will apply for either individuals or businesses.
States will be penalized for taxing the first $50K that individuals or businesses make by [their rate on that $50K - 5% (non-negative numbers only)] via various deductions to federal->state transfers.