It's not the point of a success story. Cons are leaving Lab in a hole, forced to pick up and pay major compensation, we are talking billions of pounds.
Infected blood scandal was created by Margaret Thatcher's government when Ken Clarke was a decision maker. Blair and Brown could have started the inquiry, as could probably around 10(? thereabouts?) Conservative governments we've had since. Nobody but Theresa May had the balls to do it. I actually rate May quite highly overall, albeit she also had some shambolic moments.
The Post Office scandal came to light during the more recent Conservative governments and it was also being brushed under the carpet for a long time until now.