Its not just widows, divorcees etc.
If you have say 5 Kids and the tution is $5,000 a kid, thats $25,000 you need Before taxes and any other expensive (Including food and rent/mortgage) You need to make an insane amount of money to be frum nowadays. If your rent/mortgage is $2000 a month thats another $24,000 you need, $49,000 and you didnt buy food , utitities or transportation or pay taxes yet. You easily need to make $100,000 just to get by. $75,000 isnt going to cut it. and $75,000 is a decent salary.