Am enjoying this topic as I also find it interesting people perception of income.
My siblings think my husband must earn a lot more then he does ($87000) as we have three young children, mortgage, caravan and live quite comfortably on one income.
I am really organised with good meal planning and do a lot of baking for our snacks so I keep our food shopping down to $200 a fortnight and we normally get take away once and go out for lunch/ dinner once in a fortnight.
My oldest is 3.5 and doesn't go to private kindy ( qld-year before formal school) as I love having her at home and believe I can offer her more experiences then the money it would cost us to send her.
We don't have a lot of day to day cost. I don't drink coffee, husband takes leftovers for lunch. I have a gym membership and husband plays squash 3 times a week. Do free activities with kids ( playground, park, beach, library)
I guess everyone has different luxuries and priorities on what they will compromise on for lifestyle.
I think it's terrible more families can't have one parent at home. But then some people seem to want a 'better' lifestyle' so that's why they have double income.