And practically, all the data collected by private corporations can be obtained by governments via a subpoena. Until it could be changed, all corporate surveill

And practically, all the data collected by private corporations can be obtained by governments via a subpoena. Until it could be changed, all corporate surveillance is ultimately government surveillance. And there's strong evidence suggests that it occurs at a routine basis. Although some companies like Lavabit showed respectable efforts to be independent and privacy-respecting, on the other hand, some companies actively cooperating with the government, or even oppressive regimes without regards of ethics. So yes, government surveillance is worse than corporate surveillance, but the latter can be seriously harmful in many cases as well.