I suggest that knighted PCs or ones that are meant to have holdings receive a wage to represent the income they're meant to be receiving from their subjects.
This is absolutely, completely, not at all self-serving, but -
I would like to second the suggestion of knighted PCs receiving wages from their fiefs.
I support this suggestion.
The position of Knight comes, frankly speaking, with a giant target painted across your back. For so many reasons that I won´t even need to get into even trying to list them all here.
Therefore a Knight or any other kind of PC who has made it far up their local hierarchy ladder has to ideally remain mechanically strong or surround themselves with strong people.
Either way, any small bit of income would greatly benefit high level PCs who are otherwise p-much quest-starved.
I too support this suggestion.