DM: For a long time the way that government and the social service world worked to help homeless people was through a range of services and interventions that tried to help people on the street, tried to get them into shelters, tried to provide them with substance abuse or job counseling. This whole idea became known as the "continuum of care" -- a continuum of services.

Housing First is a really different idea. The idea is that you want to get people into housing as quickly as possible, especially people who would be considered chronically homeless. You have a small population of people who are persistently homeless and may not be able to get out of homelessness without serious, ongoing help. These people use an enormous amount of resources. They take up an enormous number of shelter beds. The idea is that you find a permanent solution for these people, it immediately reduces the number of homeless people on the street, it helps the people who are most in need, and then in theory, it frees up the resources that might be wasted on them for people for whom sort of a quick bit of intervention, a little bit of counseling, a leg up, might get them back on their feet and independent." (Prospect)

The US reduced homelessness by 30% between 2005-2007. Click on the link to read the interviwe on the approach being used to reduce this blight of society (no, it doesn't involve forcibly taking homeless people off the street)

Click here to read more of the guy responsible for executing the policy in the US.