When are you ready to leave?

In today's LA Times, there is an article discussing FEMA's efforts to have people in FEMA trailers who were displaced by Katrina find new residences. That begs the question, how long should these government agencies be responsible for displaced individuals and families. It is generally a sad situation when people cannot move back to their hometown because they lack the resources to find suitable housing, however, the must be some other mechanism that helps people get back on their feet. Should FEMA really have a long term role in housing displaced people? It seems to me that this responsibility should fall on some other government agency.