I'd be surprised if said 'neo-liberal forces within Greece' weren't getting some external help at this point in the game.
I'm sure they are, but I wonder about the nature of that "help." I'm sure there are pro-troika pollsters and campaigners at work, but austerity is a pretty hard thing to sell--"Vote for Poverty." I reckon most of the "external help" will be coercive, indeed military, in nature.