I am not sure I agree with they above, but in any event, the reality is that most people are greedy. Irrespective of political allegiances.
It's apparently dreadful to be well off and to wish to do the best for yourself and your family. But if you are less well off, this is perfectly fine, admirable even.
Just look at the 10,000 who turned up in Gateshead. What are they campaigning for? More money for themselves. Directly in terms of pay and pay rises, and indirectly in terms of benefits - schools, policing, NHS etc - that they want other people to pay for.
I wonder how many of the 10,000 were very wealthy or even moderately wealthy and welcoming paying more tax out of principle? If it's more than 1% of the crowd, I'd be astonished. 99% are there to seek a better deal for themselves, and that is their prime motivation. Not some noble egalitarian principle.