How about get rid of all income tax rates period, both individual and business?
If you think the IRS is intrusive now, just wait until they are chasing every self-employed "consultant" for sales taxes, every barter transaction, every gift... If you think the drug war is bad, if you think property seizures for collections are bad now, just wait until there is a "FARE Tax" because the size of the black market will be so huge that the IRS will take total control of cash, seize assets in lieu of payment, and watch every transaction to get its cut. That includes chipping people to buy or sell.
Spending is the problem. Tax policy pales by comparison.