I don't know why things are so difficult now. There's got to be some detailed studies into this problem.
[1] https://en.wikipedia.org/wiki/Civilian_Conservation_Corps
[2] https://en.wikipedia.org/wiki/Works_Progress_Administration
[3] https://en.wikipedia.org/wiki/Civil_Works_Administration
[4] https://en.wikipedia.org/wiki/Marshall_Plan
[5] https://en.wikipedia.org/wiki/Federal-Aid_Highway_Act_of_195...