Government spying in the U.S?

There is a conspiracy theory that the United States government is spying on its citizens. They are using cameras on streets to spy on people. When you are on the phone they are monitoring your conversations. If you talk about bad things you might have a government agent at your front door. There is also a program called Infragard that is basically a program with members in it that are part of every type of business and all around the United States. They tell the government about people that they think are bad. They work with the F.B.I to secure the United States. They spy on their neighbors and coworkers. If you are at the store and use your credit card, the information about the things you buy are being sent to a lot of companies. So watch what you buy to eat or your insurance company might drop you.