Problem is that you get used to good money, and spend it just as quick, it's more like an addiction where you find it very hard to go back to a normal lower paid city job. Spending money to me was an offset to the amount of time I spent away, trying to live life to its fullest in just a short period of time whilst on break. A lot of other people I knew lived in the same fashion.
If you do move into mining, a much better idea is to go into a residential role vs fifo, at least you have your partner and kids close by, and can enjoy some sort of lifestyle.