The one minute independetarian case for a basic income:
Property rights are not natural, they are a social convention. But they give each individual freedom, as the essence of property is the right to exclude others, to have a place where no one else has dominion over you. The first rule should be that each individual has inalienable ownership over her own body and mind. But carving up all of nature outside of bodies leaves some people unnaturally without the means to obtain the necessities of life. Therefore each person must also have an inalienable property right to these necessities. Society owes you a living, because society is preventing you from foraging the land to obtain the necessities of life on your own. Society could rectify this problem by letting individuals forage for necessities wherever they wish, or by giving them the land they need to survive on their own, or by providing these necessities directly. But in modern societies, the most efficient way to provide for these necessities is with direct cash payments, a basic income.