I was going to say this. In addition to what you say a lot of shareholders are in i for the short term. They are interested in what the share price will do in the short term.
Directors remuneration mostly decided by other directors (and just approved by shareholders who are not bothered), who tend to take the view that it is worth paying directors very highly.
Its something that has got worse, but its not new. As GK Galbraith said "The salary of the chief executive of a large corporation is not a market award for achievement. It is frequently in the nature of a warm personal gesture by the individual to himself."