This is probably one of those questions that could be answered by Zorro better than me, but I'll suggest that "tax cut economics" are thought to "prime the pump" and "get things going again". But a large part of the problem I see is that the Federal Reserve banking cartel already DID that, starting as far back as August 2007! They 'rescued' the ones they wanted to save, and rolled out handout welfare programs for everybody else. People who actually SAVE money in savings accounts got SCREWED ROYALLY, and still are.... We had all those "QE's" (I, II, and III) rolled out, plus "Operation Twist" in 2011 (which nobody seems to remember). We also had interest rates ground into the dirt, where they have largely remained, except for microscopic rate increases starting late in 2015, but now even those have stopped -- and it's likely that Wall Street will be coddled and protected with bales more of essentially 'free money' for the rest of the year. Bottom line: Trump's big hooptie "tax reform" put about an extra thousand bucks back in my pocket -- no big deal, but I'd rather have it than NOT have it. Meanwhile the price of everything continues to go up, but even so, the Fed may actually CUT interest rates again, thus "kicking the can down the road" yet again. Back in 1981, President Ronald Reagan and Fed. Chairman, Paul Volcker knew HOW "prime the pump" (with what was called "Reaganomics"), and IT WORKED! Yes, it involved a lot of government spending (largely on defense, which had been in the ditch for over eight years), but the economy we had in the 1980's was amazing. I wish we had it back... a LOT of people probably do.