Lets be honest, the Valakians kept a stranglehold on any arable land, and wouldnt let the Menk own any.
Thus forcing them into perpetual dependency.
But one possible solution?
BUY a continent, with the cure, as a refuge for the Menk, so they can "Grow according to their own strenghs" or what have you.
just an idea that I noticed, first time I saw the episode.
Anything wrong with that?