Labour have an obligation to introduce pr

Unlike the Tories... Labour have an obligation to make sure the voting system is fair and proportional. The reason for the exclusion of the Tories in this stipulation is that democracy is the means by which the people are able to constrain socialism. Because the Tories are not generally seen as a socialist party it is (perhaps) redundant to criticise them for their position on fptp. But Labour are a socialist party and their mandate for economic intervention comes from elections. If these elections are unfair then Labour do not have a mandate for their actions.