"many of Labour policies are explicitly aimed at causing financial harm"
That would be harmful if that were the aim
What they are saying - as are all the other parties except the BXP - is that currently the balance has swung too much to the better off and against the poor, disabled and public services
There has been a transfer of wealth over the last 9 years or so from the less well off to the wealthy
So to redress the balance, the better off should be taxed more,
not as punishment, but because there is no Magic Money Tree - except when it comes to Brexit.
In normal, i.e. non-Brexit times, where the balance lies is what defines the policies of all parties
and also how to increase any tax, e.g. IHT, gift tax, wealth tax , ......
As for moving abroad, it is much more difficult than in previous decades to move to English-speaking counries
and there are only certain jobs / professions where one can move to non-English speaking - many of whom are prepared to pay higher tax and are moving to higher tax countries in the EU
And of course many people have commitments such as schools, elderly parents etc which they can't leave behind
So those of us who have left or can leave are a tiny minority of those who are angered by either Tory or labour policies.