I don't disagree with it being hard pill to swallow, but surely that is a result of the messed up housing market (which we can put the blame on that with New Labour and the Tories)?
So if Labour could combine the taxation policy with policies that aim to fix the housing mess we are in (things like mass home building, fairer rights for tenants, reforms in the mortgage market - its a joke that paying hundreds a month in rent for years on end is not counted as being able to prove you can afford a cheaper mortgage, etc) then yes the extra tax would be hard to swallow as a purely money going out pov, but that family could end up better off overall because of the other policies.
Really, in my view, it is that kind of joined up thinking that is missing from the Labour leadership at the moment.
But it is also something missing from the Tories (cutting council funding then wondering why social care, which is largely council funded, is struggling, and not seeing the knock on that would have on the NHS) and from the general public (being in favour of tax cuts but then complaining when services they rely on such as the NHS, schools, local councils etc are struggling for money).