It would be interesting to know if the ga financial model works either in the short term (in which you spend no money on capital investment) or the long term (where you do).
My guess, and it really is a guess, is that the local population is not large enough to support a sufficient ga fleet.
It is a huge shame but whether some of the larger semi commercial airports will survive without support is debatable. We dont see these facilities worthy of community support in the same way as france, which could make all the difference.