Roger and Gilmour are both Socialists. Rog has been since he got married (I believe in the 1970s) and from what I read his wife was even farther to the Left.
Gilmour has called himself a Socialist in interviews as well.
I recognize their politics and take their political outburts with a grain of salt.
Gilmour at least seems like a pleasant person. They were somewhat spoiled prats from Oxford. Rick Wright and Syd appears to be much nicer people.
I think drummer Nick Mason became a larger shareholder in the band because his family loaned the band money early on.
Slimy Roger kicked fellow founder Rick Wright out of the band.