Anyway, some combination of cash on hand, liquid assets, credit, or just friends and family should be able to cover next months rent or something is very wrong with your finances. If you just mean need income at some point then sure most people are in that place, but any specific interview should not be all that important long term.
Further, for the vast majority of people retirement is based on personal savings. If you don't have several months savings by 30 that's a really bad sign that something is very wrong.