I would like to rid the World of Idiotic Politicians, but that would mean there would be no Politicians.
With regards to ridding society of homeless people, yes it can be done by a variety of methods.
But most of these methods would mean that we would no longer have what we call Democracy.
To do it and still be able to call our society 'Democratic' and say this with a straight face and in all honesty is not possible.
So I have to assume in the absence of a 'PLAN' that President Obama is simply posturing.