Actually we are asking people who benefit disproportionately to pay a [very] little extra for that privilege, such that the services of government can be applied for everyone. In the post-war era the economy exploded because more people had more money to spend. Nominal highest tax rate was 90%, which ended up being around 45% in actual. You can say "horse shit" all you want, but the economy was damaged in the 80s by the drastic drops in top tax rates and beginning of capital deregulation which encouraged the taking and hoarding of wealth from the economy. Reagan built his entire economy on massive deficit spending. Unlike W who tried the same thing in the last decade, Reagan also re-raised taxes to buffer the impact.
Look at any banana republic where a dictator takes power. A very few hoard the wealth, the middle-class disappears, and the economy tanks. You are arguing a hollow and false ideology against an empirical history of fact.