U.S. Billionaires Grew Their Wealth by $340B in 2021 as Middle Class Shrinks Written on January 3, 2022. Posted in PT Global Economy. This content is restricted to site members. If you are an existing user, please log in. New users may register below.Existing Users Log InUsername or EmailPassword Remember Me New User RegistrationChoose a Username*First Name*Last Name*Email*PasswordConfirm Password*Required field Previous Next