We have good reason to believe that the inflation of the past several years is
almost entirely due to increased spending by the wealthy...and yet the economy is continuing to grow incredibly slowly, to the point that we've been in an iddy biddy recession for the past few quarters if you
exclude the Big 7 tech companies into which capital is piling because our fundamentals are otherwise not good. Of course, this is all aside the fact that no one's actually
making money on the generative AI bullpoop that all that capital is piling into. The 10% of the population with substantial financial assets are just as prone to more or less magical thinking about what makes an economy work and what will make them personally wealthier as the rest of us; the trouble is that they have the resources to drag the us along in their fantasizing.
The simple truth is that you cannot rely entirely on a tiny minority's spending to drive an economy, because they cannot possibly spend all the wealth they accumulate. The period in history in which the West experienced its fastest economic growth (the post-war economic boom) was immediately after a period of immense capital destruction (read Piketty's
Capital). The best way to stimulate an economy is to give the most people possible more money; marginal propensity to spend is a thing. This is all aside the politics of immense wealth disparities. These are all certainly a global problems, but few places have them at the same scale and magnitude as the U.S. does.