All of that distorts the market and makes everyone spend money they don't actually have. Eventually all of this catches up with everyone, on a country-wide scale.
So much for all that personal responsibility we used to hear so much about. Far easier to blame the government for everything.
Companies use credit to buy back stock because we deregulated that activity. It used to be that the government didn’t allow it. This point is actually a counter-point to your theory.
/s
For example, let's cherry-pick the Clean Air Act and its effects: "In addition, because air quality across the United States improved; it is estimated 205,000 premature deaths and millions of other respiratory complications were prevented which resulted in an economic savings of $50 trillion versus the $523 billion invested to meet the Clean Air Act standard."
https://en.wikipedia.org/wiki/Clean_Air_Act_(United_States)#...