We have only to look at the allocation of physician time. The Dartmouth Study - We don't have time in the evening due to bureaucratic overregulation.
The article in the December 6, 2016 Annals of Internal Medicine - Allocation of Physician "Time in Ambulatory Practice: A Time and Motion Study in 4 Specialties" points this out.
It concluded: During the office day, physicians spent 27.0% of their total time on direct clinical face time with patients and 49.2% of their time on EHR and desk work. While in the examination room with patients, physicians spent 52.9% of the time on direct clinical face time and 37.0% on EHR and desk work. The 21 physicians who completed after-hours diaries reported 1 to 2 hours of after-hours work each night, devoted mostly to EHR tasks.