there's no fixed rule. your stability depends on your lifestyle a.k.a. your expenditures. simple as that.

oh. so a girl can't control her spending habits and the guy gets the blame for not able to support it?

how about we look at which is the REAL negative value for proper living?

anyway for me, i would just blame the guy for stupid enough to get a girl of high-maintenance.
yes, which is why both parties must know how to manage finance.

cheers.