It's not that big a deal ~ more pressing are the medical scam artists who certify disabilities improperly. The OIG goes after them because they send and take checks, and write notes (all letter mail BTW ~ yup, just write a check ~ that's a letter ~ it's regulated by the Private Express Statutes, and writing a check for a bribe, or cashing a check paid for a bribe, is to commit MAIL FRAUD).
People writing checks is a bigger deal ~ still, when you catch only one employee you also catch a medic who is probably committing fraud ~ and if you catch him you can catch his cronies AND the other people who are defrauding disability.
So, let me make this offer to you ~ SEND ME THE NAMES AND ADDRESSES of those you have seen who you are sure are committing fraud against Disability Insurance and I'll pass them on to friends in the business of catching the bad guys. Or, you can do it yourself ~ just notify the USPS Inspector General ~ http://www.uspsoig.gov/
Turn 'em in~