Well in all fairness, the gentleman in question could afford to pay his council tax, he just took a stand against the tax on behalf of other pensioners.
As for paying extra myself to cover a pensioners portion of council tax, im afraid to say that as selfish as it sounds, no I would not be willing to do that.
I'm constantly skint myself and whilst I sympathise with anyone, not just pensioners, who are struggling to pay their tax, I' m exactly the same boat- I struggle to pay all my bills, council tax included.