I watched the programme last night...the sight of that kid chewing kebab from a carton whilst sat on the floor was pretty horrific. Some of the 'pupils' were afraid to handle raw meat...not even knowing how to use a cooker? Unreal. Mind you, one of the houses they lived in looked depressing enough to make anyone give up - terrible taste in sofas too - but that's another matter (or is it somehow related?)
I was raised on standard working class food - meat, spuds and veg home cooked - no foreign muck!

Curry? No way. Italian? Forget it. That age now seems like a golden one as far as working class eating habits are concerned. Couldn't help wondering how things got this bad afterwards...supermarket ready meals? The plethora of kebab shops and Chicken Village?
Someone mentioned the psychological element, which is surely the key because budget doesn't come into if you're wise to buying food. Education, yes...christ, what kind of age are we living in when, despite all the cookery programmes and recipes in 'papers/magazines a lot of people need educating?
Somewhere down the line the tradition of good home cooking was trashed...in the 80s, I'm guessing. Women do work full time now, but it only takes 20mins to cook a decent meal.
I think there used to be a subconscious snobbery/elitism about eating out because it once was a treat for the working classes, but now it's more common (even I can do it regularly) - that effect is lessened - until you get snobby about where you eat.