You are facing the problem of short termism.
It's inherent wherever someone has control over property for a period of time, but doesn't own it.
A good analogy is the difference in the care people usually take of their own car, compared to how they'll treat a hire car or a pool car.
With your own car, you generally try to maximise the life that you're going to get out of it, and any resale value that it might still have when you're done with it.
It would be rare to see someone taking the works pool car home to wash and wax it, or vacuum it out. It typically gets driven hard, because, what the he'll, it probably won't give up when you're driving it.
Trump and any other 'residents has five years to rob the country to reward his cronies. So long as he can manage to keep kicking the can down the road, and complete collapse doesn't occur on his watch, it becomes someone else's problem after that.
The area I live in used to be owned by the church. Adjacent areas were largely owned by privete estates.
On the private estates there are substantial farm steadings and model villages for farm and mine workers, in order to attract the best tenants.
By contrast a Bishop had a few years to milk the estate for income to spend on fine dining and whores. He couldn't sell it or pass it on to heirs. So apart for houses for clergy, the buildings were small and poorly built, the strip system of farming continued in enclosed fields until... pretty much the present day. They had the worst tenants that no one else would have.
Don't get me wrong, you can get a very bad private landlord or monarch, but if he's threatening the inheritance, or the dynasty he (or she) is likely to find himself closely supervised, or meet with a car crash.
If everyone is a self owner, then it's up to them to take care of what is their'site, as they see fit.