Wyllow3
Perhaps there is space for these school leavers if its the one year scheme - someone said this on another board -
If its young people with no qualifications, someone has to cook, medical orderlies, stock food and equipment, clean uniforms, mend vehicles, help dig people out in national emergencies..
If they do have qualifications, it could be a doorway for those with qualifications to deciding whether they are interested in a career like this whatever their skills are.
All cooks, medical orderlies, logistics and engineering soldiers are also highly trained combat soldiers . Soldiers clean their own uniforms and none of the jobs you mention in an army milieu are gig jobs suitable for the untrained and unqualified.
The most appropriate way of training these eager young recruits would be through the territorial army framework, not the main army, who are too small in number and as a result too busy keeping themselves fighting ready to deal with a bunch of raw enthusiastic young people eager to earn money in their gap year.