All of the comments here attacking Warren Buffett's authenticity, suggesting that he should put his money where his mouth is and write the Treasury a big fat check, are missing the whole point. Services provided by the government are public goods. It's blindingly obvious that a single person cannot pay for those public goods. Just Buffett's own contributions, no matter how much he donates, will not be enough to solve…
Huh? By this logic, taxes are "meaningless" unless everyone pays taxes. However, many poor and lower-income people do not pay income taxes. Does that render the income tax "meaningless"?
Also, the claim that it's "like the neighborhood park... [e]veryone wants one, but no one wants to pay for it" is absurd. We see many examples of charitable contributions made by the rich and the middle class which are used to purchase public goods such as museums, nature preserves and the like.
When push comes to shove, what Buffet really wants -- and what you are advocating when you say that no matter how much money he donates, it "will not be enough to solve our budget issues" -- is an increase in the size of government fueled by higher taxes, rather than a diminution of its scope by reducing the funds made available to it.
A bigger government benefits crony capitalists like Buffet, because they have sufficient power and influence to ensure that the goodies that can be redistributed by the Leviathan are steered their way. I wish Buffet would be honest enough to say that, rather than bloviating about how terrible it is that he doesn't pay enough taxes when he is unwilling to take the obvious direct action necessary to rectify that unfortunate situation.