Disability compensation is $2239 per month (12/1/03 rate) for a single, 100% disabled veteran. A 90% disabled vet gets $1334. A Spec-4 with more than 2 years service receives $1638 per month (1/1/04 rates), without and allowances added. Since PTSD is a acknowledged and treatable medical condition, it seems unlikely to me that a sick soldier would be kept in Iraq to save a maximum of $400 per month.