Why don't we have independent public TV like this in US?

Weeks before the Iraq invasion, the BBC's Jeremy Paxman and skeptical British citizens literally cross-examined Prime Minister Tony Blair about evidence/reasons/legality behind the invasion -- an interview whose transcript became part of last year's official Iraq inquiry in Britain. (Here's another tough Paxman interview of Blair having nothing to do with Iraq.)

In our country, bullying from politicians + lack of insulated funding = embarrassing timidity at so-called "public television"...as evidenced by PBS surgically removing Tina Fey's comedic swipes at Sarah Palin from a broadcast in November 2010.

Country by country comparisons of spending on public broadcasting here.