A society must have jobs that can employ folks across the IQ spectrum, or else a permanent underclass results. The USA was always the economic pinnacle because of our successful middle class, which the globalists have tried to destroy.
You do not necessarily have an underclass unless you choose to subsidize it. Mean IQ in the US has increased somewhere around 20-30 points (no great single source, based on mixed estimates) during the transition from an agricultural to industrial economy (1880 - 1980). In the absence of subsidization, those with higher IQs reproduced more, those without less, which was coupled with an influx of higher IQ immigrants which ultimately resulted in a slow but significant increase in IQ, sufficient to raise the mean more than enough to go from meeting the minimum requirements for a worker in the agricultural age (~75) to the industrial age (~100). By changing our policy in the 1960s to (i) Subsidize children born to low IQ people (LBJ) and (ii) Encourage low IQ immigrants and discourage higher IQ immigrants (Kennedy) we get a permanent underclass and for the first time a reduction in mean IQ. I would estimate you need to have a minimum IQ of 110~115 to succeed as a technical worker in the digital economy based on employees I have managed (knowing their GPAs, GREs and how that maps to IQ), and had we continued a similar policy, we could have likely gotten close to that. If we reverse this policy we can as a nation have a workforce mostly equipped to meet the minimum requirements for a digital economy. Of course there will always be a small number of people who fall through the cracks, but as long as they are small they can be cared for charitably without destroying the wealth of the nation.