What is wrong with that is as a lone parent it is usually a lot harder to get a job and if your children are sick and you need to take time off to look after first one sick child and then another you tend to find that the job doesn't last very long.
The Daily Mail myth that lone parents sit on their backsides watching Jeremy Kyle is far from the truth as far as I am aware. All the single parents I know work - the last thing a SP needs is more pressure to find a job or lose benefits when the discrimination out there prevents SP finding a job - not the fact they don't want to work.
I work three jobs - I'm a teaching asst, a writer and a window dresser - I start work at 6 am and I'm working now - just having a little break as I have writers block! (I'll get off to bed in half an hour) My TA job looks like it won't last much longer - may not have a job next term - and as I'm now in my late 40's I might have trouble finding another as my age is against me and as SP that too is against me. As with most things a few bad apples give the rest a bad name and we all have to suffer the consequences!