> The folks that have a lot of money don't spend it. Out of all of Buffett's, Gates', and Bezos' fortunes how much is being spent 'productively' and how much is just sitting around collecting interest on interest. The velocity of money hasn't been doing much in recent decades
You seem to indicate they have lots of money, but most of their wealth is assets, much of which is ownership of their own companies. If they "spent" that it would mean selling pieces of the company to someone else, and they would lose power to make the sorts of decisions that made the company successful in the first place. Letting a lot of middle class people's retirement savings managers make all the board decisions for Microsoft is not going to provide the same level of innovation as letting Gates have a large vote. The only reason those stocks have any value at all is because of the size and market position of the company. There is no benefit in letting this form of wealth have "money velocity".
Maybe you left Musk off the list on purpose, but what he's "doing with his wealth" is trying to make humans a multi-planet race, and he literally doesn't even care what his company shares are worth to other people. Is it really "money" if he doesn't intend to sell it? His recent sale of lots of Tesla was only because he had options to buy more of the company and immediately sell it. (and now he'll pay a few billion in tax, on that, since it was actually income) Until he did that, all his "wealth" was a mental fiction invented by him and the hard working people in his company. The real money just moved into his account for the first time in a long while, as he drained your retirement account in exchange for the idea that they now have a tiny piece of control over Tesla.