Simply untrue on the math. Germany did not do it, China did not do it and North Korea did not do it. America in the mid 1880's did it and the result was huge, its how we got where we are, then we did a smaller version of it in the late 1930's and had a huge boom. We did the opposite in the 1910's and the late 1980's. We have never done it fully and have never seen what a huge effect it would have on innovation, technology and national wealth.
Germany merged its government with industry, thats not what I am suggesting. Germany nationalized production and turned it into a war effort that was hugely successful until, the United States responded with huge taxes and conversion of wealth so we could beat them.
If the innovation and boom of the 1940's had been spent internally just imagine the boom, we had a boom anyway, but imagine if a huge percentage had not been (rightly so) spent on military operations overseas.
You see, the wealthy have only allowed it to happen in times when foreigners threatened their existence, but imagine if we did not, not in response to the need to win a huge war, but as a method of spurring on huge innovation and a Pax-Americana. There is SOOO much stagnant wealth, supporting the likes of Trumps children, and other trust fund babies that if it were used to reward the hard working and innovative, we would catapult ahead lightyears.