Bankruptcy is great for human thriving, and the extensive US bankruptcy system is one of the best tools our legal system has for people who wind up in bad situations. It's a complete shame that we decided that student loan debt was ineligible for most forms of bankruptcy once it became clear that federal guaranteeing of loans would generate a lot of high risk loans.

But fleeing to another country and/or simply refusing to pay your debts, regardless of whether or not you are able to are is not bankruptcy. It's simply refusing to pay your debts.