After World War II essentially the only significantly large industrial base was in the USA. The USA was emerging as a national power in the early 1900’s. The wake of World War I and World War II left a very odd situation. You had many formerly very rich countries that were devastated and one rich country that wasn’t. Devastation is not easy to overcome in even 20 years. So for a good 2 decades the USA got wealthier and wealthier even while other formerly rich countries were re-developing their countries rapidly.
This made the USA even richer as selling to all those around the world was pretty easy, just creating enough stuff was the hardest part. Almost none of the current emerging markets were doing much of anything economically. This resulted in the USA being able to live incredibly well and generate enormous wealth.
The main legacy of this is a huge benefit to the USA – enormous wealth and experience. However, it seems to have left people thinking the USA is just suppose to be enormously wealthy always no matter if we throw away hundreds of billions a year on a broken health care system, provide huge benefits to political donors (farmers or bankers or phone oligopolists or robbers of the public domain [preventing innovation through repressive, outdated “intellectual property” regimes]), spending many hundreds of billions yearly on military expenditures far beyond those of any other country… It doesn’t work that way.
You can waste huge amounts of economic benefit when you are the dominant economic power globally. And when you were as rich as the USA was in the 1950s and 1960s more and more people felt they deserved to be favored with economic gifts. So for a a few decades the USA used the excess wealth to pay off all sorts of special interests and still do very well economically. The only thing surprising is how long we have been able to keep this up.
It isn’t rational to base expectations on periods when we were granted economic wealth largely by virtue of the world industrial production, other than ours, being destroyed. This isn’t the only reason we were wealthy, we do many things very well (compared to other countries) entrepreneurship, less corruption (still way too much but less than average), from 1950 to about 1990 an equitable distribution of economic gains, until recently a good advanced education system, a brilliant system to turn science and engineering breakthroughs into economic profit (that in the last few decades other countries are starting to do, but they are still way behind)…
From 1970s until say the 2000s we could use our accumulated wealth to live off and allow huge inefficiencies to continue (lousy job of regulating banks, lousy job of subsidizing farming, lousy job of subsidizing lousy food [making it cheap to eat unhealthy food and expensive to eat healthy food], lousy job of controlling the costs of higher education, lousy job of getting people to realize they cannot expect to live far beyond most everyone else in the world just because they were born in the USA…
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