I repeat...willful ignorance is no virtue. The policy of government investment is there from virtually the beginning of the US government, of which I have pointed out several concrete examples.
What HAS been a massive failure has been spending on social welfare, which has expanded hugely, and which accounts for pretty much all the massive growth in federal spending. The tiny amount spent for the activities the constitute investments aren't even a blip in that.
Again, I gave you actual government spending data and you just ignore it. Goodbye, tool.