You actually believe that con, do you? Let me tell you a story...
My 80 something widowed mother lived on her own in her own little house that she'd lived in for some 50 years when the Poll Tax came in. Under the old rates scheme she got a 100% rebate since she had little other income than her state pension. So in fact ended up paying considerably *more* in hard cash than before.
Of course a *rich* elderly person in a *large* house paid less, but then they were the standard Tory voter so this was only to be expected...