First past the post subsidises the rich

First past the post traps poor people into subsidising the rich... or voting for something worse on the left. Assuming the party of the centre-left in a fptp dictatorship has become Stalinist and unelectable then even if poor people want to reject the left fptp gives them no option to do so. Fptp forces the poor to vote for the rich or face Stalinism. This is not good because it is not good for the rich to be subsidised.