I took it more to mean that the role held by RMS is to ensure that Taler remains free software (as in freedom) as defined by FSF. He also mentions in the video that he is there to ensure that Taler remains free software (as in freedom). It is my impression that in the eyes of RMS and FSF, non-free software is immoral. And hence the title, I think.

I see. It appears to be yet another instance of Stallman being Stallman. I’m going to be very surprised if this goes anywhere at all.