"the tax system as set up by FDR was what built America"
WRONG. FUD. CLUELESS.
FDR's socialism actually SLOWED DOWN the recovery from the 'Great Depression'. A few things, like deposit insurance, made sense [this kept most banks from making high risk loans due to regulation involving the insurance requirement, which is what caused the banking crisis of the late 1920's]. But *MOST* of what FDR did domestically was CRAP, and should be ABANDONED, starting with Keynsian economics and ending with the so-called "progressive" taxation of incomes [it keeps people from BECOMING "the rich"].
What ended the depression was the war-time economy cause by WORLD WAR 2, and the massive spending at the end of the war as soldiers and sailors and marines came back home and bought houses and cars and other stuff they'd saved up for.
During the 1950's tax rates were INCREASED with the top marginal rate being 90% (yes, 90%) and *TONS* of loopholes for tax shelters "for the rich" to go with it [to 'stimulate' certain pet areas of the economy], so as to *SLOW* *DOWN* the U.S. economy, most likely [from a 'globalist' kind of perspective] to "allow Europe and Asia to 'catch up' to the USA after having to repair all of that war damage".
By the 1960's, JFK saw how this was STIFLING the US economy, and basically laid out supply side economics and TAX CUTS to the New York Economic Society in December of 1962. This actually made him the BETTER choice over Nixon, who was pretty much the same as Kennedy on most points that were important to people at the time. [yes, I _JUST_ praised a Democrat!]
And so I conclude: FDR's policies *STIFLED* the US economy, by putting more gummint control over it. JFK's, and Regan's, and now Trump's policies *UNLEASH* the economy, by lowering the marginal tax rates.
Our current income tax was implemented (after the approval of the relevant constitutional amendment) during the time of Woodrow Wilson, a globalist, socialist, "chicken in every pot" type of Demo-Rat politician who NEVER should have been President of the USA. Only the top 10% of income earners were affected by the 2 percent tax. Now, look where it is _NOW_ !!!
And America was MOSTLY built without an income tax. BIG GUMMINT was built WITH it.