Mega Corporation fraud

In the beginning mega corporations started our as small "mom & pop" shops, simply offering great reliable products and services. As the decades went by, the peoples of the world supported them by their purchases. Today these mega corporations; GE, Walmart, Disney, Dupoint, 3M, Google, Facebook, Nestle, Kellogg, Pepsico, etc. have became BIGGER than life, not only do we buy their products, but in secret these mega corporations influence US governement. Has the US been sold out? Six corporations own 90% of US media.