I don't get the point. If something is truly worth having, indeed, let's have it. This is about a society deciding to make certain public services an essential part of its infrastructure.
I personally belief that informing and educating the public is so essential that it can not be made dependent on the ebb and flow of donations by "well-heeled" supporters, nor the interests of commercial radio and television.
There's a parallel to funding basic science here. Our society has decided this is a crucial element of our national infrastructure and it is being funded at levels that match that commitment (or lack thereof). Your argument is similar to claiming a bunch of rich people will get together to take care of funding basis research; have our national laboratories organize yearly fund-raisers so that their rich, liberal defenders could be made to pay for their own science.
In fact, I would now go a little further and argue that if you are willing to make that point, it is equivalent to saying you care but not really mean it. Sure, we care about science, but why should we be in the business of funding it?