Not every couple fights over money.
If a couple is (always fighting) about money it's because they have different values. A conservative spender and a lavish spender will have problems without a doubt.
Like attracts like and opposites attract divorce attorneys!
There is no amount of "work" or "communication" that can overcome being with someone who simply does NOT want what (you) want. Compatibility trumps compromise!
There are only two ways to experience joy and peace of mind in relationships: We either get what we want or we learn to be happy with what we have. Accept them (as is) or move on.