So yes, Amazon represents 'good management thinking' post 2010. But not corporate thinking pre 1980s that, you know, build the US/UK to the positions they were able to cost on up until now.
My impression is that as they calcify into money-printing machines, this stopped. An example being Google's famed 20% that are apparently a long dead memory.
We're now in the end stage of the latter in the US.
The US still plays at invention - or rather a few of its oligarchs do - but it's far, far behind what's happening in other countries.
Oligarch is a specific thing with a specific meaning.
That alone places a combined 3 people with more money than the GDP of all but 20 countries.
Also, "net worth" is not "money". Shares of a company aren't money.
They can be placed as collateral in exchange for a loan or other similar ways to access capital immediately.
If Zuck walks into a bank and asks for a million dollars cash on the spot and is willing to place a few thousand shares up as collateral, he gets that done in minutes.
If he announced he is selling them all at once, I have no doubt in my mind he could get someone (or a group of investors, or a bank) to purchase all those class B shares almost immediately at a VERY healthy premium. Meta shares are currently around USD $715. There's absolutely zero doubt in my mind that if he was to sell them in a block, with the outsized voting power, he could command roughly USD $950-1100 per share with ease.