You sound like you're from the cult of plug-my-ears, dude. There are number of awesome things about the US of A, and that's why I moved here, for the awesomeness.
But no, corporate greed has not always been this way. You need to start listening to global politics and news sources with reporters who aren't paid by the mainstream American media owners, so you can lose the cult-view. There's a reason why all the non-Americans on the board are all collectively ing about your health care system, etc.
Al Jazeera (award-winning global reporting), Naomi Klein's Shock Doctrine, etc.
The key word here is distribution. America until the Reagan era used to be sweet. But then what happened was, basically, government deregulation let all the heavyweight corporations bring figurative guns to figurative knife fights. Then it becomes David v. Goliath, with Goliath having all sorts of fancy new fighterjet tech and David is stuck with his stones.
This happened with the banks (see chart below), and it also happened with the media. There are like, 3 or 4 people who own the entire American media system. No exaggeration.