Part of the problem with the newer radars is that they don't "see" gliders made from newer composite materials. ATC has already been equipped with radar that does see ALL traffic, it's called SSR, unfortunately (for you glider types) it requires ALL traffic to have a Transponder.
I can't understand your problem with fitting the kit. Surely it enhances flight safety for everyone, not just your commercial pilots (who apparently don't look out of the window
) What possible objection can you have to be being visible on radar and visible on TCAS?? Is it just the cost??
I spend a lot of time transiting and operating outside CAS, lookout is very important, unfortunately gliders are not the easiest thing to spot even at a TAS of 250kts...so for guys going considerably faster the problem is even greater. The danger of mid-air collision is considerably reduced by the use of TCAS / Mode S / SSR and a radar service.
It would be interesting to hear the views of any military guys operating the fast metal over the highlands outside CAS.