They have not been paid for eight months forcing them to find other ways of supporting their families, he said.
The doctor's account comes as the UN reports that "severe hunger" was hitting ever more people in Tigray.
Ethiopia's 14-month war has led to a humanitarian crisis affecting millions.
Federal government forces have been fighting rebels from the northern Tigray region since November 2020 in a conflict that has killed thousands of people.
For a lot of that time much of Tigray has been cut off, making it hard to deliver vital aid and medical supplies. Banks have also been shut meaning that people cannot access savings or funds to pay others.