The market doesn't capture and represent all value created by labor. When I call a tow truck to jump start my car, that transaction is captured by the market, but when I call my friend with cables to do the same thing, it is not represented in the GDP. The same thing goes for a lot of "work" that is not done for compensation but adds a great deal of value to community. Basic income recognizes this fact that merely existing as part of a community you are providing some basic value even if you're not paid for that work. I think the critics are right that there are potential cultural problems around entitlement and an unwillingness to contribute in any form, but I'm more optimistic about human nature.