In my opinion usa survive because of the consumption.
i'm french and I spent 20 day between l.a - frisco - and vegas in september.
i couldn't believe the number of fast food - groceries - liquor store - shop - market - mall etc etc etc.
in l.a at each street crossing there was four gas station and four different fast food - taco bell, denny, in n' out, b king, and even more little restaurant chinese mexican pizza etc etc.
gas station making burger, protein bar everywhere.
what amaze me is that they were full 24-24.
the in and out in vegas near the on tropicana was full all day long and first night in vegas we ate at "a all you can eat" chinese at 03 a.m, the place was full.
restaurant are closed at 21 p.m in france and open at 11 a.m.
same thing for ralph albertson wall-m (crappy place) target etc etc.
America is the land of consummation, it survive because american are consumming everytime so they spend money, that create job etc etc.
it's a circle.