> No matter what the numbers in the bank account says, the number of people who can get the good stuff will be limited to the actual infrastructure and actual production output.

Only if you define "the good stuff" as "the best stuff." If you define "the good stuff" relative to a subsistence farming or hunter-gatherer lifestyle, the median person today in a developed country is arguably richer than the richest person in town 50 years ago, the richest person in the country 100 years ago, and the richest person on the planet 500 years ago.