One is inclined to suggest that one of two solutions are needed.
(1) The american approach - abolish the requirement for an RT license altogether and simply bollock anybody who mis-uses it.
(2) Make gliders stick to the same approach as powered, students under training to, say, Silver-C, may use RT under instructional supervision but are expected to go and get a license.
Contradictory approaches, but either should work, it's the current halfway house that seems absurd.
G