Even houses? Mortgages are a loan worth getting IMO, even if few other loans are. Mortgages (back in the early 20th century) gave many working people the freedom to start using their money on themselves, rather than on landlords.
Back on topic: I'm no fan of Tesco, but I'll do my bit by not buying an iPhone off them. I can't sensibly afford one anyway, so I haven't got one.