[schoen]

There's Keynes himself on generating employment by burying money in the ground.

https://en.wikipedia.org/wiki/The_General_Theory_of_Employme...

I'm not sure if that example is exactly equivalent to breaking windows and paying people to fix them (for example, maybe it matters a great deal for his view that it's the government which is paying for the demand stimulus).

[clock_tower]

Found it: it's Paul Krugman who advocates for this -- at least if this link (disclaimer: just skimmed the article, didn't check it or its context for their political views) is accurate: http://www.economicpolicyjournal.com/2013/12/lol-more-proble...