He's a saver, she's a spender; you think the marriage would be doomed but he keeps them from going into bankruptcy and she makes sure they have alot of fun.
{i} rescuer, salvager; one who safeguards; redeemer, one who delivers from sin; one who conserves; one who preserves, one who maintains
A saver is a person who regularly saves money by paying it into a bank account or a building society. Low interest rates are bad news for savers. someone who saves money in a bank