are ruining the US

The reason is that they're taught to think that running a convenience store is the same as running a university library is the same as running a steel plant is the same as running a software house.

And, of course the majority of them:

can't think beyond the current quarter;
have a 75% or so probability that they won't be with the same company, or even the same industry, in three years, and of course don't want to move laterally, so they take everything they can out of the company to "cut costs", and "increase revenue"...and leave the company gutted.
Oh, and don't argue, as a professor of economics from the U of P did with me, that they're just "going with the tax laws", since we know who paid the politicians to pass those laws.