Apparently at the request of Republican Senator Tom Coburn, the Government Accountability Office has done a study of the concurrent receipt of Social Security disability benefits, Veterans benefits and military retirement. Here is an excerpt:
Out of the 1.9 million DOD [Department of Defense] nondisability and disability retirees, we identified 59,251 individuals who received concurrent payments in fiscal year 2013 from DOD retirement, VA disability compensation, and SSDI. The payments totaled over $3.5 billion. From our population of individuals receiving concurrent payments, we also selected a random sample of seven individuals to provide illustrative examples. These seven examples individually received from $19,210 to $152,719 in concurrent benefits.