That was the problem with the Corbyn era slogan, For the Many not the Few.The labour movement was a reaction to more straightforward times, the haves and the have nots, like centuries past when the peasants revolted against the wealthy elite. As a society there is no longer 2 main groups of people.
The peasants are as likely to blame each other as the well to do's and plenty are happy to hang on to what they have.
You used to go into the polling station with a pretty straightforward choice between blue and red. That is no longer the case. Its why the polls look like they do.
There are now too few of the Many.