The problem with the Labour Party of Corbyn and co is that it is a party based entirely on fictional idealism, with little if any relation to real life in 2020.
Corbyn still thinks he is fighting mill owners and chucking clogs into machinery, and that everyone wants to be as badly off as everyone else.
The Labour Party's wilful unwillingness to appreciate the changes in society in general, and its voter profile in particular, is what led to its crushing defeat in the last election.
The concept of aspiration is like a cross to a vampire for Corbyn and co, but it absolutely fuels the desires and attitudes of the modern working person, and that is why they comprehensively abandoned the Marxist drivel that Corbyn spouted at them.
It's fine for Corbyn, his entire life has consisted of living in a world of theoretical socialism, utterly untouched by even a hint of reality.
The problem for his party, is that they live in the real world, not the fictional one he enjoys, and they have no time for his fantastical visions of socialism which are no more rooted in the real world that the tooth fairy.
Mr Starmer may realign the party with reality, if he can lose the fanatical Left, which can see its power draining away, but it will be a long and bitter fight, maybe longer than his career.
Either way, Corbyn hangs on as an embarrassment, he feels he didn't lose the election, he simply failed to get his views across. The reality is, he got his views across perfectly, and they were all utter nonsense.
Sir Kier has a mountain to climb - we'll see if he's got the oxygen for it.