What percentage of their income should a millionaire pay.
2) What is the current percentage millionaire's currently pay.
I would add:
Why should a “millionaire” pay any more in ACTUAL DOLLARS to support the government than the less wealthy.
What has personal income or net worth got to do with one’s obligation to pay for government?
And, at the crux of what asymmetrical taxation actually is: “What right do you have to steal from another man because he has more than you do?”