I don't have a problem with some having more wealth than others. Often it is nothing more than a person who created something the rest of us couldn't, or has invested what they have and grew that wealth more than other will.
I did notice the article states "money" in the headline and then uses "wealth" in the article. Those are two totally different things. Those can be two totally different things.
How much a CEO makes I think is a fair discussion to have, but what a person does with that money isn't. IMO investing, buying real estate, stock, bonds, etc is up to the individual. Even the poor can do that, just at a smaller scale. We often hear of the janitor who dies and the family finds he's worth millions from investing.