This can depend on what way the person wants to be successful. if they want to be more successful with their happiness, then a lot of money could support happiness or create discontent. If a person wanted a marriage to be held together by his wealth, it can depend on how the money is used... for example, if a couple has no money or very little, then they can get into fights caused by stress... and if a couple has a lot of money, then they could also get into fights because of greed. It really all depends on the users and possessors of the cash.
I hope this answered your question effectively enough.