It is obviously an unjust society that lets cripples and children die of starvation and exposure. I don’t see how that is a misuse of the term “unjust” in ordinary usage. (I’m not arguing all of the unfortunate can be helped, that’s Paul Wellstone-ism, not my view.
No one has ever shown that the slippery slope to socialism exists. You can imagine slippery slopes anywhere. “One drink, and you’ll inevitably become an alcoholic.” “Give the state the power to imprison citizens, and it will eventually imprison people arbitrarily, en masse, with no justification.” America doesn’t let cripples die, and it still isn’t socialist. We use reason and debate to stop ourselves from slipping.
The argument is certainly not respectable as he puts it. In my family we used to call it The Fatal Glass of Beer Theory, after a W.C. Fields short whose plot you can imagine. It is easy to do something in moderation; people, and even governments, manage it all the time.
Slippery slope theorists, however, rarely make the argument in this bald form, and if they do it isn’t really what they mean. They are asking for a principle, an intellectualy tenable distinction, something beyond “less” and “more.” One can drink so long as it doesn’t seriously impair one’s ability to function. The state can imprison people so long as they have violated the rights of others. The state can seize assets from its citizens to keep cripples from dying so long as — well, this time it’s not so simple. To ask for a distinction between seizing assets to help some of the unfortunate a little and seizing them to help all of the unfortunate a lot — between Jim’s position and “Wellstone-ism” — seems to me a perfectly respectable demand.
(Update: Jim answers.)