Not really-really.
The consultants pay taxes on the money they get from you only because (if) they respect the Law, it is none of your business (it is the IRS's one) if the consultants later comply.
If you prefer, whether the consultants pay taxes or not doesn't change anything in your company's accounts, you have an expense and proper documentation for it, what happens after and outside the transaction is irrelevant.
The issue (from your or your company's point of view) is how to properly document the expense (and it is IMHO a tough one to document a ransom).