Fair enough, although I'm not sure I understand the Spurs analogy. The way in which political parties are financed is a big old subject: there are arguments that there should be more taxpayer funding but this isn't the time to think about that. In the meantime, the money has to come from somewhere and many would say it is better that it comes from small donations from people in the street than vast cheques from unions and billionaires. That's my view anyway; I guess you disagree.
The Spurs analogy was a bit daft in that a few Spurs fans that I know seem to be so blinkered that it doesn't matter what happens they believe they are the best team.
I think the bigger point is that I find it astonishing that anyone would align themselves to a political party and then pay for the privilege to do so, which for many seems quite an extreme political position and perhaps shows why you are so vehemently pro something or anti something even when something doesn't support that view.
Personally I have all my politicians and political parties on notice, they deserve nothing more.