It is time to clean house from top to bottom and the Roger Stone arrest is just one more reason to disband the FBI and fire all its employees. The functions that are worthwhile should be put under other existing departments and have extremely strict Congressional and Executive branch oversite.
Back during JE Hoover's reign, it would have been financially impossible to do the kind of surveillance/intel gathering on anyone other than key government or criminal figures.
These days, most surveillance/intel gathering is all automated.