Elon Musk Wants Big Families. He Bought a Secret Compound for His

If you're at the top rungs of society, generally you want more people; this either means more consumers or more relative status, provided those people do not encroach on one's own status.

Can you choose to not take part of this boring new world?

No? ok, back to NPC role

Mr Musk is correct - a shrinking population will endanger his ability to make even more money.

The only people that want more people are the ones that have the means (financial) to negate all the negative aspects over population creates. They do not have to worry about medical care, shop, wait in lines or count their pennies when they spend money. TSA is not even a thing for you if you have your own jet. Life is good for billionaires. Quality of life for the masses only gets worse.