Suemoo
What's his attitude to this? Does he acknowledge that you're better at managing finances or might he take offence? I would suss out his feelings on it and I agree with previous poster to be careful not to hit any sore spots, it can be a sensitive topic for both parties.
Rereading your initial post, it sounds to me like you think his spending is a bit out of control. This may be a different issue than simply managing finances if he has to change his spending habits. One approach is to discuss the larger plan with him, agree on investments etc and he'll just have to make do with what he's left with . . .but will he just keep going to the bank for top up loans?
A