Two useful sites

Well, while I'm on the theme of wealth distribution. Perhaps these two sites may help:

Your place in the UK
Your place in the world

Both, it has to be said, measure wealth in raw monetary income, rather than disposable - for instance they include income before housing costs and work-travel costs eat away at it, etc. What they illustrate, though is the obscene misdistribution of wealth in the world.

Obviously, we'd say rather than feel guilty, or give to charity, you should join us in levelling the world up through common ownership.