If I understand correctly, a good number of firefighters work on a volunteer or part-time basis, and the government should make clear the difference between the two to allow for better use of the tax credit. Many of them do seasonal work and rely on EI for part of the year, but when they respond to calls, they are penalized. That partly explains the challenge around retention. Basically, the EI rules need to be changed to support firefighter recruitment.
On February 4th, 2020. See this statement in context.