Absolutely not, the Government should not be able to monitor phone calls, unless given permission. Phone calls will naturally contain private and confidential information about ones personal and professional life. The last thing I would want is to know someone is listening in on a conversation with myself and my family.
America, also known as Land of the Free is where people from all over the world come to have freedom. If people found out that the government was monitoring every ones phone calls then there would be a big dispute. It is very unjust to listen to every ones conversations especially private ones.