With todays radar coverage, I cannot se one sigle reason why any european country should have anything but class D or higher airspace above say FL100. One exception might be over oceans where there are not to much traffic. (offcourse areas with oil installations are except from this) Airports serviceing more then 1 or 2 passenger flights a day should have a class D or higher CTR, AND the CTR need a TMA streching to said FL100.
It's not only me that has this view, but Eurocontrol as well....
And the MIL boys argument that they need mass amounts of class G to fly in is
. They manage quite well in class D and A over here.
As for Gliders, I thought the "sail before steam" applied everywhere, sure does here. (But then we have som peculiar deviations from Doc4444
)