I believe the financial infidelity most happen in the western world due to the laws that favor some gender over others, and I believe the law need to be amendment because some of the favor gender (woman) are abusing the benefits through the habit of using to steal from some man and turning them into something they didnt wanted. Besides, some men have lost their lives through the act by committing suicide.

Having said that, in my country that issue of financial infidelity are hardly seen because the law seems to favor both side, but the woman has right over her husband properties, and the man can choose to compensate her so she can start a new life (because we have some woman which dedicate their whole life and career to the marriage), while he also pays for the childrens expense.