I'm shocked, shocked I tell you that the takeover of private business by government and installation of a socialist/communist regime could possibly lead to disastrous results. Nobody could have possibly foreseen this
The bottom line is that the idiots down there have found out the hard way that at some point you run out of other people's money to hand out. Antagonize business, nationalize international companies to make sure foreign investment stops, destroy the local economy by taking assets out of the hands of the productive and hand it to the unproductive, and on and on.
Now they've reached the point where they need to make hard choices. If you don't pay off those ebil banksters, they'll stop lending you more money and you'll have no money to pay for even the most basic of services. Pay off those ebil banksters the interest you agreed to, and your citizens suffer because you have no money to pay for basic services.
Venezuela has a ton of resources, including oil, and yet has turned into a complete and total disaster. This should be an abject lesson for all the Sean-Penn-esque idiots who saw Chavez as some sort of hero for the people. This is what Chavez and his scum brought their country.