I haven't had a compelling enough reason to seek out multiple different SS numbers, I would just figure out a different way. I don't know if I could or would have access to that.
I do see some benefits to having legal multiple SS numbers and different names to match. But, the same name and DOB with a different SS number wouldn't benefit me for anything I do since they usually look at the name and DOB.
Even if you hit a jackpot and provide them with an incorrect SS number or legitimate tax ID number not on file and they catch it, or just can't confirm your actual SS number, you can simply sign paperwork claiming that's your SS/Tax ID number and they will pay you. I have had to do this on multiple occasions outside the state when they couldn't verify my actual SS number. I don't ever carry my SS card.
When you say Feds, I don't even know what you mean by that, because I assumed Social Security numbers are overseen by the SSA?
How many of those different SS numbers are authorized for use at one time? Can you legally use whatever one you want whenever you want? Are you implying you have a special connection that can get you them legally or otherwise, something or someone most people don't have access to? Or that you worked undercover that allowed for that?
Im aware you can apply for a new SS number for various reasons. Domestic violence seems to be a common reason. Damn, man... How many Exes beat the shit out of you?
Way Back in the day, it was probably fairly simple.