I think Jeremy needs to be really honest about what socialism will mean.   The old rhetoric of the "glorious working class" is dead and buried.
There are people who want to live on benefits....we all know them, there are those who rip off the health service, unregulated immigration from poorer nations to provide cheap labour is not a socialist principle, the middle classes and the wealthy are going to be considerably worse off financially.

Abuses by the poor are at the moment excused by even bigger abuses by the corporations, big business and grasping politicians.

Under a socialist regime, ALL of this will have to be brought to an end.
Explaining and educating the population will be Jeremy's biggest problem.