The only problems are that, first, it is not a Prime Minister's place to reform the media in a democracy, and second, Zeman's method of immature tirade does more harm than good for all sides concerned. Many commentators and reporters are little more than hired pens for the politicians who pay them. The revolving door between the media, ministry press offices and larger firms' PR departments assures compliant reporting of state and business affairs. I could tell you of my discussions with Czech commentators when they admitted quite openly to being on the take from politicians or political parties. But my accusations would simply be denied by those concerned, and it would be a pointless game of one person's word against the other's in which I would look like a fool for making accusations I could not prove.
Any real proof is clearly impossible.
Politicians, political parties and private firms do not exactly sign contracts with their hired guns in the media. The system does not work that way for obvious reasons. This is clearly Zeman's problem. He can say he heard from a company director that the firm had to pay hundreds of thousands to get positive articles written about it in an economic weekly. Zeman can say another journalist was on the take from the energy monopoly to write favourable articles on nuclear power.