Warren Buffett, hypocrite

I'm not convinced that, in his role as BH's CEO, stalling on paying BH's taxes makes him a hypocrite vice wanting to pay more personally.

As a CEO, his goals and responsibilities are almost certain to be different (and/or opposed) to his goals for himself.

And in the end, is this not just a base tu quoque fallacy? (His argument about the wealthy is false because he himself...)