Is there anything "outside" the market?

Are they able to participate in mutual exchange? If yes, they are market actors.

You are starting from a false assumption. That the disabled need the government to care for them, or even more basically, that the government actually does care for the disabled.

Of course it does!

Anybody who is not free is not part of the free market; and billions of people in this world are not free.

I work with individuals with disabilities, and I’m not entirely sure if all of them (most are able) are able to do a mutual exchange.

You work with them… good. My wife and I go to the store and get food or take it out of the garden. We then prepare a dish to eat and my two year old son partakes. We share.

It took me a little while to figure this one out. Right on! [:D]