The only higher Return On Investment than creating yourself or finding and securinb a monopoly position and squeezing costumers is, maybe, buying politicians and having laws written to favour you, so naturally people guided only by the personal upside maximization idology will engage in both if they think they can get away withnit (or the penalties if caught are less than the profits).

It is absolutelly natural in Capitalism for companies to seek and even create monopoly positions and then squeeze customers, and to corrupt those who make the laws and regulations as well as those who enforce them, and often these things are combined: notice for example how the artifical monopoly which is Copyright has been repeatedly extended in duration to well beyond the point were there is an upside for Society, and now none of us will ever see the works created during our lifetime become Public Works.