There's been plenty of subsidization efforts, but they made the mistake of subsidizing technologies that were too innovative and too early on in the scaling curve. e.g. Solyndra with CIGS https://en.wikipedia.org/wiki/Solyndra
> Between 2009 and mid-2011 the price of polysilicon, the key ingredient for most competing technologies, dropped by about 89% due to Chinese advances in the Siemens process.
"Massive cost reduction in the existing, boring, process" beat "new technology". Possibly for the best in this case, since CIGS and CdTe are poisonous in a way that polysilicon isn't.
