It was a widely debated topic inside the Pirate Party during their heyday 1-2 years ago. They declared basic income as one of their core goals, which rendered them unelectable for many people and accelerated their downfall.
(I personally think that people should be allowed to act in that way - but the reality is that it made them very easy targets for journalists who wanted to paint a negative impression of the party.)
While this clearly is just anecdotal, it might explain the bigger pattern why the Party had more success 3 years ago while it was clearly economically liberal, and while it is stagnating today where it is clearly turning more and more to the left. Younger Germans, who initially grew the Pirates, neither wished nor need yet another leftist utopia lying to voters about things they cant finance.