I'm having a hard time following the thinking in many of these threads so I'm not sure if you're questioning it genuinely (or hypothetically or sarcastically), but I think essentially yes sadly.

Wealthier areas wonder why it costs so much for house renovations or for daycare or`for farmer's market produce. Or similarly folks move to less wealthy countries as "expats" and hire help, babysitters, tutors. Sense of prosperity seems tied to those things feeling inexpensive and them feeling cheap requires income inequality. There's I think a large amount of feeling poor (or average) when those things are eating your budget. Even though you have them. For example, you pay for expensive childcare so both parents can work, it takes a big bite out of your budget, and so you don't feel wealthy (but you're paying for childcare and your family has an employee). Similarly, you're paying for expensive private school, it eats your budget, you don't feel wealthy (but your child is going to private school).

For those doing well, the surplus goes to what's left—house, education, healthcare (I recall there being a fourth, but I'm blanking). Those things are expensive because they should be, you're wealthy. You're competing with the other wealthy people. I'm stealing this from somewhere, but they're essentially luxury goods—the more money you have, the more (and better quality) you consume. They don't decrease as percent of income as food does.

Most developed countries are quickly losing population. The ones that have a slight deviation from that trend is due to immigration.

Foreign labor is what will keep most of these countries afloat for the following 50 years.

Japan is a good example, they lose about 1 million every year.