God, no. You're not even close to the limits of what money can buy. You may not even have enough money to be able to buy a private jet; it depends on the jet. You certainly haven't earned enough money that it would make any sense for you to buy a jet.
As an outsider to this all FAANG thing that feels wrong to me, it has always felt so.
What happens, or at least what I think happens because of this strategy, is that lots of institutional knowledge gets lots pretty fast and in an irremediable way, because many of those L4s and L5s that ended up not making it to L6, and so got the boot, knew of some parts of the "system" that no-one else did.
Unless a FAANG company only relies on L6s and higher to get a hold over that institutional knowledge over the long term, which I pretty much doubt it can happen.
the more realistic scenario is attrition, going to another place for L+1 comp
L4 is terminal. There is no requirement to ever be promoted to L5 (though there is some language about continued expansion of skills at L4). Most engineers will never make L6 in their entire career at Google and nobody is concerned about people chilling at lower levels.