If you were to list them as stats per cost things look very different. Flo costs just $100 per day and with her high wisdom she can at least train militia cheaply (and gets quite good at it after a while). Plus she gets better prices at Tony's. Shank is pretty much the same - wisdom of 80 means he can make a militia trainer, though he doesn't have the teaching trait like Flo. Who cares about $20 a day? He can uncover sectors you wouldn't visit otherwise and then train militia in Drassen or the first SAM site if you've lost people up there. Admittedly that's not much and I wouldn't want to see either in a firefight (though I have and their lines are worth a chuckle or two).