I think your comment was informative. It kind of reminds me of "There, but for Fortune", by Phil Ochs:

  Show me an alley, show me a train
  Show me a hobo who sleeps out in the rain
  And I'll show you a young man with many reasons why
  And there but for fortune, may go you or I

Especially in countries with (dare I say) primitive social security, going intentionally homeless could quickly become a permanent thing. A broken down car and a medical emergency, a family tragedy -- and coming back might suddenly become an insurmountable obstacle. Difficult to get a job without a place to stay, difficult to get a place to stay without money, difficult to get money without a job...