US millennials are a bunch of people with most privilege, comfort, opportunities, freedom and other nation level perks(like infrastructure, mobility etc) compared to may be all the humans combined in all of history.
There is a reason why you can't get more out of this scheme. The reason is you can only make incremental progress in systems that are this advanced. And after that its usually a bit of Math called 'Central limit theorem'. It just means the progress will only be around the mean.
That ship sailed a while ago.
Yes, and I have completely lost faith in the US's ability, on a federal level, to staunch that failure, as long as the Republican party continues to exist.
>write off everyone who's already here
I agree that I'm being pessimistic, but I feel that's what the government is aggressively trying to do (by, for example, putting a person hostile to education in charge of the agency that runs education at a federal level).
The democrats have had control over the house or the senate for 62 out of the past 84 years, and both of them for 52 years (in total, not contiguously). There has also been a Democratic president for 48 of those years. If you're mad at the way things are, I don't think it makes sense to be mad at the Republican party, unless it's for constantly losing.
https://upload.wikimedia.org/wikipedia/commons/7/72/Combined...
An alternate way to look at this is that the economy and society of the USA is failing its own citizens by either giving them an inadequate education or not providing them opportunities to succeed. And your proposal is to simply write everyone who's already here off, declare them to be rejects, and import new people over the top of them to be worker bees for the elite.
I can say that I'm not really personally concerned with how many billionaires we have in the US, or how many multinational corporations are headquartered here. I'd be fine if that all went to China, so long as the USA stayed the land of fairness and justice.