It is selfish for the right-wing party alone to reject pr

In a fptp duopoly it is the centre-right (cr) not centre-left (cl) party which is more obnoxious in opposing pr because to do so is inconsistent with their other strongly-held beliefs. We assume the centre-right party prefers small government and the centre-left party is in favour of big government. We are aware that pr reduces the size of government because choice is good and small government is good... and so since the cr party advocates small government it is inconsistent for them to oppose reform unless they value their party above their country. Unless the cr party are selfish they have no reason to oppose pr. The cl party has legitimate reasons to reject pr because they are genuinely opposed to choice and freedom so to be in favour of fptp for them is not selfish in itself only in the broader context. It is selfish for the cr party to reject pr but not the cl party.