How to get more medical students interested in geriatrics?

Why make a subspecialty out of internal medicine when for all practical purposes IM is geriatrics. IM used to be the king of all non-surgical specialties, the doctor’s-doctor. But they don’t do kids, or pregnant patients, or patients with ‘female’ problems, or patients with ‘male’ problems (urology), and there are myriad organ specialists (heart, lung, liver, kidney, pancreas, thyroid, intestines etc.) leaving the plain old geriatric patient as the unclaimed turf of the internist. And now they want to give that up to geriatric sub-specialists? What has become of the internist?