Due to a clerical error in the Supreme Court header notes of a decision made in the late 1800s, corporations have been granted all the rights of people. Legally speaking, they've been given "personhood" and therefore are entitled to all the rights of citizens enshrined in the Constitution, except for the right to vote.
Consequently, corporations have been granted the right to "freedom of speech" which our founders had never envisioned. Furthermore, their ability to spend their economic resources in electoral politics has been determined to be an exercise of their free speech.
Because corporations hold far more wealth than all the human citizens of the U.S. combined, they have massive undue influence in our electoral and political process. As a result, government often acts to benefit corporations and at the expense of the public.
Over the years, giant corporations have continued to consolidate their power and control of our political system, our media, our educational system, our economy, our public institutions and even over the non-profit sector and our leisure and entertainment.
This has not been good for our society, for our livelihoods, or for our government. If this trend is not stopped very soon, we will reach a point where it cannot be rolled back.
The solution doesn't have to be complex. Revoking corporate "personhood" and enforcing existing laws would be a start.