The American economy is over 70% consumption. This doesn't mean "increase consumption to increase the American economy." We will probably never get under 50% consumption, because we are a mature economy with creature comforts. But the more we invest, the more stuff our children will have.

Consumption is the easiest thing to gin up in the short term, so governments that are on rapid election cycles always can choose policies to bump them up. But, although I believe Keynesianism is correct when it says you should pump consumption to get out of a recession, I also believe Keynesianism is correct when it says you should not be encouraging consumption when not in a recession. You need to save when times are good and spend when times are bad.

If I send my money to a foreign company, the economy is global. It may or may not benefit my country, but it sure isn't being hoarded.