Here in Australia we have handouts to the unemployed like most countries. And like most countries there are people who just live on these handouts.
I can fix that.
Unless you are properly disabled and can't work because of it this happens.
1. You become unemployed.
2. Handouts for 6 months.
3. Congratulations, welcome to the army.
It's simple really. You get 6 months to find a job and then you get conscripted. You can leave at any time IF you have a job lined up. To solve people waiting 6 months, conscription, get job, leave job a day later, repeat indefinately etc. you have 3 chances. After that you are immediately re-conscripted. It would be the real army. The conscripted would enter as normal soldiers.
For those who usually couldn't enter because of criminal records etc. they are put in the penal battalions.
For those too fat/weak etc. they get put into a special fitness program until they are ready for entry.
For those who have conditions preventing them from combat roles they are given paper-pushing jobs.
You would be paid an average wage for your rank.
There would be no limitations on ranks achievable etc.
In effect: work or fight. No middle-ground (except old people).