exactly, the code ain't that variable, it's only about the fief moneyz.
what one could do though is: making an fixed "fief prosperity vs fief gold" code, that then varies for every time the prosperity changes and then buys different stuff.
not sure though if this is possible to code with the current strat.
but yeah i know what u mean, would be nice to have some kind of change, hopefully this could be made with some quick fixes and not like go into every single fief and reset an invidual item set (would be alot of work).