Talking about a normal size family, two/three children. Not talking about riches either, just an ordinary place to live and everyone well fed and clothed, all needs covered without state benefits. Any full time job as well, not just some fancy high paid thing.
I know for lots of people working really hard in full time jobs supporting their family just isn't possible on the money.
YANBU - they should be able to support a family.
YABU - they shouldn't be able to have a home and children on an unskilled job.