At some point in the future there will be a truly operation-stopping manpower crisis or, even worse, a defeat of ill-equipped, poorly supported, inexperienced British forces. Although not directly responsible, JPA and it's stealth cuts will undoubtedly feature as contributory in the resultant Bloggs Report as another milestone in the erosion of quality of life.
Oh ye of too much faith. Such a crisis will result in a one-page report that will blame the wrong kind of snow and a couple of highly-capable but not so articulate SNCOs and result in promotion for the people who made the key errors but produced a superb PowerPoint pres showing the lessons learned.
Indeed, it will probably carry a paragraph saying "but for the rapid and smooth introduction of JPA, the crisis would have been much worse".