Well in fact there is no clear ressemblance with communism. Communism primary principle is that all the means of production are state owned, and everyone is therefore salaried by the state, earning as much as everyone else with no oncentive to work more and or better. Basic income aims to the contrary, by helping businesses to offer more flexible work contracts (part-time, temporary work, ...) and potentially lower wages (if the UBI is 1000€/month someone who currently earns 1500€ each month could take a 500€/month position and keep the same life level). It is in fact a completely capitalist idea
"earn more for producing less economic output" is not capitalist. you can't simply change the meaning of words to fit your agenda and convince anyone but the extremely gullible.
There are several different ways to implement UBI (look up "negative income tax" for one example). None of them actually result in someone earning more by working less, the marginal income seen given marginal nominal income still has a positive slope.
