Deregulation

A serious question: Has deregulation ever led to anything except corruption, environmental destruction, harm to citizens and consumers and financial disaster?
Think about what deregulation is. We, the People pass laws to govern and benefit ourselves. Deregulation really means reducing the amount of control that We, the People have over the decisions that are made — and handing that control to a few wealthy people who control businesses. It is also a redistribution of the benefits from those businesses away from We, the People and to a wealthy few.
WHY would we ever want do do that?