Are you saying train a 45 year old infantry Havaldar for one year and have him do what a sepoy does in Corps of Artillery? That isn't going to work. He'll be gone in another 4 years if he isn't promoted anyway. Waste of resources.
One option is expanding the role of JCOs. They can do what Lieutenants and captains do... Platoon commanders and the such.. And identifying ORs and NCOs who can be officers and training them..