Why is it any of our business?
To ask him during an open session like that is just seeking to embarrass him and she had no right to ask him. He should have just said "That's none of your business unless the committee has a question relevant to what my own pay is, in which I shall answer it privately."
However since we're on the topic - in isolation, a CEO/high ranking exec pay is none of our business, until we start looking at the bigger picture. I've got absolutely no problem with people making money, however the issue comes when the wealthy are becoming wealthier at a geometric rate, whilst people who work in their businesses are losing their jobs/not getting paid a fair share of the work they put into the company. This then does start to affect everyone else, because with people out of work/unhappy in their jobs/falling ill because of the stress at work, they put a significant burden on the state.
And when you hear that these companies can't even pay a fair amount of tax to recompense the state for the underlying protection provided by the rest of society which allows them to make the astronomical amount of money they do, you can't help but think something is awry.