Saying basic income is socialism is as absurd as saying money is socialism. It’s money. It’s all it is. What do people do with the money? They use it in markets. In other words, basic income is fuel for markets. 

Markets are a wonderful invention that serves to calculate via a massively distributed computer comprised of people, what goods and services should be made, using what, going where, by whom, of what quantity, etc. It’s an incredible act of decentralization built upon supply and demand signaling.