The Tories are not interested in freedom

There is no reason for a party (ostensibly) of small government to be against pr other than for selfish and narrow party political reasons. First past the post doesn't make it any less likely that a party of collectivism and economic interventionism will get elected... in fact there are valid arguments to show that this is actually more likely to happen. The Tories rarely get elected under fptp. The only reason to support fptp is to protect the two establishment parties from the electorate. It is equally possible to get a small government (in fact it is more likely) under proportional representation than fptp.