The figures for deaths at Mid-staffs are not at all acceptable but quoted often as between 400 and 1200, not 'thousands'. Some of the other stats you give are questioned for example by FullFacts (apparently a Tory supported site). While I don't subscribe that you cannot trust any stats, I do think those promoted (from any party) could be scrutinised just as one would for anything that is marketed. I also think it is presumptuous of you to suggest those of 'a left wing persuasion' cannot decide for themselves which way to vote.