There could be a fair and equitable way to assess critical service fees to non-profits, but then there is the issue of 'voter approved' tax increases. My rural fire levy just went from $200 to $550 and the fire station abandoned the station 5 miles away, and built a new one 15 miles (and two small towns) away. They won't enter into a 'mutual aid agreement' with the towns, as they are in a turf (tax) war.
Thus there is legitimate concern for the point of accountability of tax entity providers of services. (the 'Blank-check-syndrome')
Regional Port Districts (often exempt as Gov entity) seem to be a big culprit of property tax abuse. The 'free' services they require (and use as sales promotions) are HUGE (hazmat, fire, elect, water, sewer, roads, interchanges...). They are in 'business' and generating 'revenue', so they should pay taxes just like other commercial property owners who compete with them for attracting tenants. Sometimes they apply 'surcharges to rents' to go towards services, but those often are negotiated out as incentives.
Port districts can also be counterproductive to economic growth and stability, by hoarding land and not having the $$ to build necessary buildings, or offering below market rents for LONGTERM (20 yr) leases. Our area is extremely land constrained (waterfront and national scenic area adjacent), but the local port just rented 5 critical acres for a 'waste transfer station'. Only 3 entry level jobs created, lease is 25% market rate for 20 yrs with 20 yr extension.
(and site is 'upwind / upriver' from all other port tenants...
, great location for a dump, in a windy region)
When the Gov gets involved things usually don't work out so well... note 'bailouts'