Marriage is for adults, my friend. If you don't bring maturity to the marriage table you're handicapping yourself. This man isn't negotiating feom a position of authority, or maturity; in fact he has realized that he isn't in a position to negotiate at all. He has asked for help. To advise him to begin throwing ultimatums around won't cure his core problem, which is (as he has stated) an inability to mature into adulthood.
"Marriage is for adults, my friend."
Yes, adults but not for slaves. He is already bringing home the bacon and you suggest he get busy in his spare time doing the laundry and washing the dishes.
Which leaves more time for his wife to bitc*, I suppose.