I guess the population consists of the Private Jetter's, the Private Islanders, the Penthouse Billionaires, the Multimillionaire Homes owners, Yes more than 3, Investment LLP's and multistory apartments, the Burrows Cookie Cutters, the 4 in one Condos in 100-acre fields, the Rural Farmers and business owners, Hobo Camps, the Tents & Homeless. Oh, and Government employees. The Jobs fall mostly within all of that stuff back there.
Maybe many young just don't have time for raising the kids until middle aged and adopt broken families. With the introduction of Ai, Robotic labored and education additions the earth is only gonna need maybe 500,000,000 people. Maybe 2.5 million per Country, roughly 50,000 per USA state, but realistically West Coastal 1/2 mil, 1/2 mil for the East Coastal, 1/2 mil for the south, 1/2 mil for the middle, 25,000 for Alaska, 200,000 for Hawaii and the rest scattered in the New England areas. So long buster may be the slogan.
They are a gonna want to be out flying their cars, riding their 4X4's and Jet Boating. Ya see just no time for everyday life, it's all in the clouds.
So, you see the future has nothing to do with a population explosion. Most likely an implosion. The Ladies standing tall and the men in Swashbucklers, toasting the future and stuff at closing time. Everyone's a poet and writing music.