I do wonder if Blair mooting lower taxes is a tactic to undermine Labour backbench confidence in KS and Reeves; their extreme ideology is toxic and destructive. A blind man and his dog can see the current regime is malicious and intent on destroying our way of life (whilst feathering their own nests, of course).
Blair isn't my favourite by a long shot, but I believe he's far more astute than the Dementors currently in charge, recognises the damage they've already done and is working behind the scenes to orchestrate a change of leadership for Labour.