Again, I see the overall goal as having a balanced media system. I wrote in a reply further down about the same thing. A balanced system does not mean each element has to be balanced (or "impartial"). A government-funded media station still counteracts a commercially funded media outlet on a much more fundamental functional basis than just political ideology.
Both public and private media are in my opinion necessary parts of an overall functioning and thus independent media system. This system, like every complex system, is only able to achieve "impartiality" from a certain point of observation, in this case that of the comparing listener/reader/viewer basing judgement on multiple outlets.