Funny thing is that neo-liberalism actually used to have a different meaning in Germany. That meaning also had a synonym called Ordoliberalism (https://en.wikipedia.org/wiki/Ordoliberalism), that didn't change so much in meaning.
Anyway, the Pirateparty also has a substantial social democratic background, so calling their stance social liberalism is probably more sensible. (Using the European meaning of liberalism.)
I was basically quoting the terms from the interview. You're right, social liberalism is probably the more appropriate term.
We do seem to like the word "social" here in Germany, even the "right-wing" parties like to use it, albeit not in the strictly socialist sense, of course. No prosperity gospel here. Probably because all the Calvinists ended up somewhere else…
Anyway, the Pirateparty also has a substantial social democratic background, so calling their stance social liberalism is probably more sensible. (Using the European meaning of liberalism.)