What I don't quite understand is how this ties into POP ideology. In the Communist state/conservative Supreme Soviet/Communist party in power, how is the POP deciding that he will be represented by conservatives in the Supreme Soviet, but by Communists in the lower house? Or, rather, what are the ideologies of the POPs who sustain such a system? Are they Communists? Or are they Conservatives with a preference for a planned economy?
Well a Communist dictatorship isn't the best example to pick here, because there are no elections so the Lower House will always be the communist party, while the upper house is ruling party only so will always be 100% Communist no matter what.