The conservatives make pledges to solve social issues, like homelessness, all the time. They almost never actually follow through. Instead they often act to make the problem "go away", often to the detriment of those they claimed to want to help.

One of those pledges was to cut homelessness in half. However no extra money or resources were actually provided to do this. This sign is a protest of that (and many other) lies. At a glance, it's one of their normal lies. It's only when you read it more carefully your brain goes "wait, what?!?".