I'd have to agree with the consesnsus here - the more flexibility in this area the better, there will be times when it is useful to grab the cash, make a point and suck some juice out of foreign coffers, and there are times when it makes more sense to ensure your security by despatching them.

On to the other side of said florin - again I concur. If the units/general are useful and finances permit, then yeah, buy their liberty, if not, it's "Sorry lads, I told you to stand and fight...."

I wouldn't mind being able to negotiate (just a little) on both fronts....