Can collection agencies for student loan companies take money out of my bank account without authorization?

No agency, collection or otherwise can take money from your account without 1 of 2 things happening first. Either you give them permission, or they get a judgment from the state or county giving them rights of garnishment. And even with garnishment, it comes out of your pay check if you have a job. Otherwise, removing money from a bank account without permission if a federal crime.