I think we can debate on how progressive (in terms of as you earn more you pay more) the US tax brackets should be. They are already fairly progressive relative to peer nations.

However, I am skeptical that higher taxes or just taxing the rich or high earners more will solve the deficit or government efficiency issues.

Also I disagree with 90% of income should pay 90% of taxes. People who are better capital allocators than the government should be incentivized to allocate over paying taxes.