If you want radar coverage someone will have to provide it for you, so are you and all other private flyers prepared to pay for such a service?
Can't speak for others but, personally, yes I would be willing to pay for this. I'd expect to get a service though.
I think this kind of thing shows the fallacy in arguing for continuing to have aircraft/balloons/microlights etc flying around without a transponder. Whether its Mode S or Mode C is possibly a different argument.