Lanefan
Victoria Rules
Now there, right there, is an infinite loop just looking for a place to happen!How about this; ask your players how they train themselves and give them an EXP award if it makes sense for you. EXP is the universal motivator!
I got some ExP, so I need to train, which gives me more ExP, so I need to train, which gives me more ExP, so I need ... [lather, rinse, repeat until bored]
I think the idea is to bleed off some cash and use up some game-world time, not to make them bump even faster.

Lan-"and here I thought broken infinite-loop combos were something only seen in Magic"-efan