Let's face it: there are not many "companies" like ANSP's that make 20% returns so please let them go bust and be replaced by proper companies that are paid extra when they do a good service. ANSP's are the top paid civil servants in some countries and that are messing up all the efficiencies that aviation could make overnight if we made it a true single european sky.
RANT over
‘just a thought here .... when you pay them “extra when they do a good service” - won’t that make their returns higher than the regulated margin (like happens in a privatised ANSP) ? That would make your point a self-defeating argument, and also incredibly unpopular amongst the women and men who do a brilliant job every day keeping our skies safe when you let their employer go bust (no ?).