Just **** typical !
Several points here ...
Most people think "airport" and think pf places like Manchester and Heathrow etc. Well guess what, there's only a small number of "big airports", but hundred of small airfields. If these charges are imposed, then many of them will simply switch off the radio and a piece of safety related equipment is gone. The same goes for radio navaids, many old NDBs are on small airfields, and many of them are in the "it's there it's already paid for and only costs the electricity to run it" category and would be turned off if charges were imposed.
Neither of these on their own is a huge safety issue, in good weather with good visibility. But in poor vis, both are potential lifesavers.
Now, on the subject of 25 vs 8.33kHz channel spacing. Yes, it would be nice to just wave a magic wand and make 8.33kHz the standard - and I'm sure many would like to do that. The trouble is that it then requires almost all light aircraft to replace their radios. I'm sure many of you are thinking "so what's the problem ?", cost is. Whilst some can be replaced as a slot in replacement (like changing the stereo in the car if you have a DIN unit), this is not the case with a lot of the units. So not only is it a four figure price for a new radio, but engineering charges to modify the instrument panel and wiring, and just for good measure the CAA will require fees for approving the modification ! Massive costs for lots and lots of people, absolutely no benefit to anyone because there actually isn't a shortage of frequencies, there is a shortage of management !
BTW - 8.33kHz spacing IS mandated for certain types of airspace, mostly those that aren't used (frequently or at all) by the majority of light aircraft.