There are some military tuition programs that specify that, if the recipient fails to complete their obligation, they will be required to pay back the government... at 3 times what the government expended.
I have no problem with requiring financial restitution, but this isn't about money; it's about honor and the chain of command. If these guys have no honor, there is nothing we can do about that. The military cannot function without the chain of command, and therefore they should not let this challenge go unpunished.