Perpetual cycle my friend, people generally get more conservative thinking economically as they get older and the stresses and financial pressures of family life bite.
Another reason to dislike Corbyn.
I believe Blair's genius was largely due to halting the generational switch to Conservatism.
Likewise, Dave's genius was convincing people that voting Tory doesn't mean you have to be some racist old grandpa. Both of them reached out to the 'aspirational' people who wanted a strong economy but didn't want to throw
all their liberal values under the bus.
Admittedly, both were helped by long periods of opposition, which tends to stop people switching their vote to the ruling party (because no-one really likes the government, whoever they are).
Corbyn seems too incompetent to keep middle-aged middle-of-the-road liberals voting Labour. Corbyn's got a good chunk of the the young and liberal vote, but he'll never appeal to the middle-income people with careers to pursue, mortgages to pay and kids to look after.
I know a lot of 30/40-somethings who don't want to vote for him and are in a bit of a limbo (they won't vote Tory, but think Corbyn and Farron are not viable alternatives). Drawing a big cock and balls on the ballot paper seems like a stronger candidate for the Gen X constituency.
My only (forlorn) hope is that May's "Thatcher 2.0" routine won't be popular amongst the generation that came of age in the Thatcher years. Even if your parents voted Tory, hating Thatcher was mandatory for teenagers in that era.
Maybe Clive Lewis or someone will be good for 2022, assuming he doesn't get filmed wiping his arse with the union jack or something.