Privacy is important, scum are ‘protesting’ outside of people’s homes.
BTW, Canada already has user fees for ATC, its system is independent of the government safety regulator.
(Governance of Nav Canada is effectively by a committee of user groups. Seems to work, after some difficulty early on, key is continued cooperation among the user groups. Beware term ‘privatization’. is misleading for the Canadian system.)
With airports given to local committees of professional engineers, accountants, and politicians etc. (Many airports were already owned by cities and private entities, such as Kelowna BC IIRC.)
Benefit is much less fussing about improvements to the system, as utility connects to revenue.