Clearly, a proper justification for that claim would have to be given at enormous length, and it would have to involve all sorts of ideologically charged issues. But to try to put it in a nutshell, the government has been meddling in an ever increasing range of things, and this meddling is mostly guided by a mix of bureaucratic perverse incentives and straight-out ideological delusions, each operating in a frightful positive feedback loop with the other. (Mind you, this isn't a statement of some libertarian principle that government meddling is always bad, but purely a factual statement that destructive meddling has been increasing.) At the same time, even the basic and uncontroversial functions of government have been increasingly corrupted by these ever worsening perverse incentives and ideological delusions.
Or to put it another way, what we've been seeing for several generations is a move from government based on custom and precedent to an ideological bureaucratic state. The former was indeed bad in all sorts of ways, but at least it had a decent grip on reality in essential things, as long-standing customs and precedents usually do. The latter, however, is driven by ideology and bureaucratic incentives into constant and ever more severe clashes with reality.
I wouldn't call that first paragraph a degradation in quality. I'd call that too much government. I thought you meant politicians were getting dumber or more corrupt.
I don't understand the second paragraph.
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