Happy to help:
Chav (or Ned here in Scotland) is a term for working class ne'erdowells.
A Dole Bludger is a term I've not come across before, but apparently it's an Aussie term for people who claim unemployment benefit and never look for a job.

I agree that UK NI should really be added in, but sales and property taxes - which is what Council Tax and VAT are - aren't income based taxes.
To be really fair, I suppose you would have to look at the total tax burden and also try and quantify what benefits you get back e.g. health care, public transport e.t.c.

Glad I'm in the UK:

• $0-$8836 = 0%
• $8836 - $59788 = 20%
• $59788+ = 40%

That's a great idea, I'm with you...