IMHO, just take a flat tax.
The 1040 should be three lines:
Enter gross income.
Multiply by (tax rate). If the tax rate is 10%, that would be Income x 1.10.
Pay that much.
If you made $10 all year, your tax burden would be $1.
If you made $10,000, your tax burden would be $1,000.
If you made $100,000, your tax burden would be $10,000.
If you made $1,000,000, your tax burden would be $100,000.
If you're married, filing jointly, you add your income together, multiply by (tax rate), and there's your bill.
And don't withhold. Let the wage slaves SEE how much they're paying. FEEL IT, come April 15th. Write that big, fat check and watch it fall, fall, fall into the mailbox. Being self-employed, you bet your arse I feel it when I write a check big enough to buy a new car, seal it in the envelope and hand the envelope over to the person at the post office, and get nothing but the 'reward' of not being thrown into prison at gunpoint this year. Oh, and then do the same thing with a slightly smaller check, big enough for a new computer or some kind of appliance or major home electronics for the state. Not to mention the property taxes, sales taxes, layers of utility and communications taxes, etc.
Too many idiots over-withhold and get a check back, and literally believe that they're receiving 'free money' from the government, when they're only receiving THE EXCESS MONEY that they already paid the government, that the government enjoyed all year long, while they didn't. There are WAY better saving plans that earn INTEREST.