Compared to the rest of the world - yeah. Be that 30 years ago or now. Things that are normal for Americans are something impractically good for the rest of the world.
I mean, there are median and average income maps and such on the web.
But I admit that everything is different, say, in most countries you can do fine without a car. Of what I've read and heard about USA, a car seems more important than a place to bunk (I mean, the whole concept of someone with financial problems sleeping in their car seems wild from a country where a car is something less basic than a living place).
Americans are also the primary target it's all adjusted for. Ads are a social mechanism.
Even ads for non-American audiences sometimes copy ads aimed at Americans in various detail which doesn't make sense there.
Somewhat similar to perception of fashion differing between living in a big city or in a rural area. In a big city everything is happening around you. In a rural area you learn of things happening, might get interested, might not.
OK, I might be simplifying things.