When you “tax the rich at 90%” it disincentivizes people from working - would you risk starting a business or working extra hours for only 10 cents to the dollar?
Also, how do you classify “the rich”? People in the 90th percentile of household income? That would be approximately $130K a year.
Finally, only 15% of federal spending goes to the military. Most of our spending is already for social security, Medicare, education, retirement benefits, etc.
https://www.cbpp.org/research/federal-budget/policy-basics-w...