This nation has at times, shown some governmental spine and foresight by the understanding that just about all private enterprise monopolies are a bane upon the American people, and in absence of some compelling reason why these monopolies should exist, have subsequently enacted necessary legislation to counteract such; however, in recent years that government has been consistently asleep at the wheel. The fact of the matter is that monopolies and duopolies and all those businesses in which competition essentially seems to have ceased to exist, places those corporations in the catbird seat of being able to extract extra profit from those that are their clientele, which thereby unfairly increases corporate profit, corporate power, and corporate sales.
The thing is that it is the natural order for companies, to look for ways to dominate their market share, through all possible means, and as much as they might applaud the capitalistic system they actually don't desire to really personally compete, but rather prefer instead to find a way, fair or foul, to take market share away from those that would or do compete against them. It doesn't help that in recent times, the national government has seemed blithely unconcerned about this obvious increased concentration of power into ever fewer hands, demonstrated thereby by permitting those that would be or could be competing against each other, being instead permitted to merge with one another, which therefore makes the parent company stronger and ever more dominant in their particular domain, which hardly seems prudent or fair for the general public.
The one thing that you can count on when it comes to the biggest and most powerful multinational corporations in America, is their relentless desire to increase sales, to increase profits, and to increase their market share. This thus means that there isn't a single company out there that will ever make a statement that they are satisfied with their current status and have no further desire to improve upon it. Therefore, all those that somehow believe that corporations won't try to get ever bigger, even when they are already huge, aren't paying attention to what is really going on; and when those corporations essentially control their market space, then this thus gives them the power to dictate the terms and prices of that they are selling, thus assuring them therefore of a steady stream of healthy revenue growth and profit.
Further to the point, when corporations essentially are permitted to be monopolistic in nature, or when they ostensibly compete among one another, but are actually in cahoots with rival firms, then the general public is poorly served; and in absence of some other entity somehow wreaking havoc upon them, these privileged corporations are simply counting up the profits that come their way. The bottom line is that corporations have a continuous lust for more, of which, they intuitively recognize that in absence of competition, and in absence of meaningful regulation, as well as in the absence of any governmental fiat that thereby forces them to divest and to split apart, that it is very much smooth sailing for their business enterprise, because absolutely nothing stands in their way; for when any corporation dominates their space of products and services, that fulfills a need, then the price that they so demand, is the price which must be paid.