Another financial issue raises its head in this tweet. Behind every good relationship is a couple who create guidelines around their financial situation. Setting limits to what you can spend without consultation is a really good tool.
Generally speaking, however, they should be the same for each person in the marriage. $50 might be a little too low, but the difference between that and the $600 that his wife is allowed to spend without talking to him is an indicator as to who wears the financial trousers here.