@shelbo63,
If you guys are having arguments over $20... I suspect that you are having problems in your marriage that are deeper than money.
If you are fighting over savings, the obvious answer is for you two not to share bank accounts. Separate your money, he will be responsible for his money and you will be responsible for yours. Then there is no fighting over pocket change. There are lots of happy marriages that operate this way.
If you are having these fights more than once or twice per decade, you might want to think about marriage counseling.