This argument irks me. Have you been on the inside of a homeless shelter?
The constant bed bug invasions, bunking right next to a paranoid schizophrenic, living in constant fear of rape (yes, even for men)? Treated like a social pariah on a good day, non-existent the next? This isn't even the tip of the iceberg, I assure you.
Life inside the system is not nearly as rosy as you might think.
Often I feel like people should be made to work directly with the homeless before letting them spout off on this particular topic.