If you set a number like 5 million it will eventually reach the middle class. For example, the AMT was created to tax billionaires, but I actually had to pay it one year because I sold some assets. Now middle class people have to potentially do two calculations to see if AMT applies (when you have a one time sale with a capital gain)

Instead of making lots of new rules at random cutoffs, why not just fix the rules we already have?

Repeal the stepped up basis for inheritance, repeal caps on payroll taxes, etc