Why would money have anything to do with safety?
Because like everything else, safety costs money.
Ultimately, if you wanted to make your operation as safe as possible, you would have your pilots do a sim check before every flight, not every six months; your aeroplanes would spend more time in maintainance; crew would not be rostered to legal limits, etc. etc. .....
As it is, most airlines are in the business of making money, so there is a delicate balance between how much is spent on "Safety" weighed against the possible crash.