Actually there is a reason for the increase recently, globalisation and the internet. While a top exec in the 1960 might be serving a few million customers, maybe tens of millions, now it is in the billions (also population has increased).

By the way, do you support the corporate raiders of the 1980s who were also extremely annoyed at how much execs got paid and fired them and reduced their pay? And they actually did it by putting their money where their mouth was and became shareholders in these companies, at great personal risk to themselves.