Weird, I replied but I guess my reply was deleted?

Not mutually exclusive.

I originally quoted it in French but here it is in English, "From each according to his ability, to each according to his needs."

You see Casey the bums are not giving according to their ability, so there is no need to recognize their needs. The bums have chosen to be junkies. They have decided they would rather inject poison into their veins than be active citizens. They can decide this. The rest of us can then decide that they are not giving according to their ability. If they refuse to contribute then we should be free to drive them away.

So, be it. The made their choice. The junkies and bums are not, and have no intention of being, a part of civilization.