You're doing your own argument a disservice by trying to modify the position of your opponent. That's not how discussions work.
The position that Tim (and I) argue is simple: There is X amount of money that it costs to run society. While, yes, we constantly have to figure out what that amount is, there is no question that it should be paid by everybody in that society. And that the stronger players (who both benefit most from a well funded society and who have the most to give) should be decent enough to step in appropriately.