They're not always.
Back in 2000, Parliament legislated that a serving member could collect a pension at the same time, so the member does not necessarily have to leave the forces in order to collect a pension or an award.
On June 16th, 2016. See this statement in context.
June 16th, 2016 / 12:05 p.m.
Executive Director and Chief Pensions Advocate, Bureau of Pensions Advocates, Department of Veterans Affairs
They're not always.
Back in 2000, Parliament legislated that a serving member could collect a pension at the same time, so the member does not necessarily have to leave the forces in order to collect a pension or an award.
See context to find out what was said next.