Once the economy starts to collapse even more due to rising energy prices/cost of living they'll find enough people for the front. This would be the first war ever where no one showed up. Not going to happen. Bundeswehr has been whitewashed and propped up for years already in spite of being completely incapable of even providing Germany with defense for a prolonged time.

Many IT projects for freelancers in Germany are Bundeswehr/NATO related because they're among the few who hire people right now because of the economic situation.

Once we reach the point where people have to decide if they enlist in order to to keep on feeding their families, that'll sort itself out.