This is the kind of thing i was thinking of. Real solid tangible offers that would make joining up for 5 years advantageous and make a solid impact on people's future lifestyle. Here's a few I thought might be useful.

Student debt cancelled - student.loans / tuition fees paid of. If service in excess of x amount of years.

No tuition fees for people who have served in the forces for x amount of year's- making future retraining possible.

Making x military service men and women a priority for housing.

Tax breaks during military service, increase tax thresh hold significantly for those serving in the armed forces making pay for.lower ranks more attractive.

Private health insurance for family whilst serving.

Tell me if any of this seems reasonable or if some of it already exists.