Facebook still hasn't paid that $5B FTC fine, but what happens when it does?

Facebook still owes the U.S. government $5 billion.  The social media giant has yet to make good on its debt to the American people following a record fine levied by the Federal Trade Commission in July. While the specifics of the settlement are still being challenged, it's worth asking what happens next with all that money — assuming this all eventually gets worked out.  I mean, it's not like Mark Zuckerberg can just walk one of those giant novelty-sized checks over to the the While House. ...