Here in Canada there are similar issues, there is a push to gain access to the earnings of public broadcasters. The article makes an interesting point here, it says, "No-one would want us to be paying sums where it's not at a discount to the market. People expect us to have great broadcasters, great presenters, great stars but pay them less than they would get in the market."
It's one of those non sense ideas that come out of the mouths of people in general. When the market includes comparable jobs in the private sector, how can you tell if salaries for the government sponsored jobs are discounted or overpriced without including a database of the jobs in the private sector? To be equal, is there a reason to mandate and publish the earnings of the private sector?
The real issue here is about whether or not the tax payer should have access to see how his money is being spent when it's handed over to the government.