the government will probably need to break up existing giants, as it did to the old AT&T and Standard Oil
AT&T one of the corporate behemoths have been very good for their executives and largest shareholders and bad for almost everyone else. Sooner or later AT&T will raise prices. They hold down wages, because where else are workers going to go? most of the AT&T workforce is locked into their job, careeless professional without identity in exchange for a pay check.
They use their resources to sway government policy. Many of our economic ills like income stagnation and a decline in entrepreneurship stem partly from AT&T corporate gigantism.