I would disagree that that is an example of generational warfare.
The older people get, the less of their money tends to be in actual stocks, and the shares managed by retirement funds are inevitably non-voting, so they can't even voice what tiny bit of opinion their fraction of ownership would theoretically get them.
The "shareholders" being performed for are the managers of those investment funds.
Making obscene wealth on stock investing is relatively rare, but making obscene wealth investing other people's money and then paying yourself an obscene salary out of the proceeds is far more common.
Those are the people who control the massive amounts of money that companies perform for to drive up share prices.
Why own when you can get paid to control? Then your money isn't on the line and you don't need to be lucky to get rich.