US tax revenues as a percentage of GDP have been fairly stable over the long term (IIRC), so if government's a problem it's not in the sense of government capturing all the resources. Regulation could be an issue.
The most recent big innovation in energy is fracking. Clearly this has experienced regulatory headwinds, and a pile of environmentalists are looking for rationalizations to stop it, but on the whole, looks to me like a reasonable rate of innovation in energy, which is in substantial part compensating for the exhaustion of hydrocarbon resources. Doubtless we could do better, but it is not obvious that to me that energy innovation is slower than would reasonably be expected in a mature field.
A good measure of innovation is new therapeutic molecular entitie...
SIAI benefactor and VC Peter Thiel has an excellent article at National Review about the stagnating progress of science and technology, which he attributes to poorly-grounded political opposition, widespread scientific illiteracy, and overspecialized, insular scientific fields. He warns that this stagnation will undermine the growth that past policies have relied on.
Noteworthy excerpts (bold added by me):
In relation to concerns expressed here about evaluating scientific field soundness:
Grave indictors:
HT: MarginalRevolution