I see your point MissM - I was just making the point about comparing like with like.
A working couple with two preschoolers on 30k each, may appear to be very well off on paper,but take out two lots of childcare costs (which would be knocking on 2k a month in many areas) and they're not. Whereas a couple with two preschoolers and only one working parent earning, say, 45k, have no childcare costs, don't have to run two cars, don't have any of the other expenses incurred by working.
If you compare like with like in a different way: two families with school age kids, one with both parents working at 30k, and the other with one parent working at 45k and one at home, then at least the second family are choosing for one parent not to work (which is a luxury really, with all kids at school).
I think at the end of the day, although it may seem unfair on families which have one higher earner, you do have to remember that in every family where both parents work, you've got double the number of hours being worked. You can't simply look at overall family income. A family with a single earner might be working, say, 40 hours a week. A family with two earners are doing 80 hours.
I can't feel huge amounts of sympathy for the woman in the article when she is clearly making a choice to not work right now, and is also clearly able to live with comfort and a fair few luxuries anyway.