You're right - property taxes (which I forgot about) probably outweigh council taxes.
But regarding the correlation, I find it very hard to believe that within a borough, those with higher income dont on average pay more council tax, no matter your two exceptions ;) (see my other comment)
In the South East and London, you're probably right. It's difficult to define, though, with the ways council tax can be divided up on a per-person basis.
In my county, I think my argument stands. Only 6% of the population is 25-35 and 40% is 60+. As a rather work poor area, nearly all of the expensive houses are owned by people who no longer work :-) This is life oop North!
Rural Lincolnshire. I believe there's one other frequent HN user around these parts :-) (I'm from London but my wife is from here, and I kinda like it now!)
But regarding the correlation, I find it very hard to believe that within a borough, those with higher income dont on average pay more council tax, no matter your two exceptions ;) (see my other comment)