It might not be a lifestyle choice, but it has become some peoples lifestyles and incredibly difficult to turn around. I've met people who have got to the point where they can't be bothered to turn it around and life as crazy as it seems to us is much easy living "outside Asda". I have also met and worked with many more who have turned it around, only to find it too difficult and have ended up back on the streets and I have worked with people who after spending many years homeless are in accomodation of varying levels. Accomodation can also be pretty crap, and scary too. I think I have worked in pretty much 90% of the homeless hostels in the North East and very few if any I would want to spend the night in, often the safest place to be is outside Asda.