Of course you do so long as you're not going to get hit by 50% tax and you're not part of the "fabled few". Everything in the Labour manifesto is paid for by someone else. Someone you're not. To say you're voting for them without self interest is rather inaccurate.
Err, sorry you're looking at this totally backward.
I'll give you my personal example: I don't look to accumulate as much wealth as possible and buy shit I think will impress other people and give myself a false impression that I matter or buy a house that is more than my family needs because, "I wouldn't want my peers to look down on me and think I'm poor now would I?"
My whole mindset is about achievement. What can be achieved for humanity and most effectively solve the problems we face. I realise that a bin man is a critical job - they definitely shouldn't be paid the wage of someone with a significantly higher skill set, but they shouldn't live in poverty and struggle through life either.
People are too focussed on materialistic needs because of ego. If you want a warranted reason to have an ego, achieve something that benefits other people. Like many in the Tory party, I do want to accumulate wealth yes - but I want to accumulate it to be in a position to most effectively impact the world positively in the manner I mention whilst only taking for myself what I need to keep that up without money stress. Money makes the world go round but I'm not a bellend who thinks I'm a big fish with power over other people because I have nicer stuff than others my social circle, which may be compared with a trampoline to that of an ant - in the context of the world it's jack shit, you bought a nice Maserati somebody else's achievements made.
Everything in the Labour manifesto isn't paid for by somebody else - it's paid for by everyone and people who earn the highest figures because the country that brought them up and educated them, enabling them to do so are going to have to shoulder less responsibility than they did from the starting figure that the tories began to bring down for them. Same (and more importantly so) with the corporations who this Govt. have let pay absolutely f all in relation to the legal responsibility they were meant to - he aint making it worse for them than it was in 2010 so don't worry, the country won't be worse off than then because of the matter. Corbyn by renationalising rail and post would also be investing the Govt.'s money so the Govt. can create other long-term revenue streams, rather than selling off every asset for a short-term Tory party jizz fest.