Let's see.....US government subsidized: railroads, aircraft, nuclear power, automobiles (road system), the internet, and many others. Lots of private sector jobs there.
Please name for me the nuclear power plant that is currently in private hands and not the direct control of either a federal or state government agency.
Those were companies providing goods and services to the federal government, energy consumers, etc. The Internet was created by DARPA, but the Dot.Coms were private firms serving consumers and other businesses, for the most part.