The fine is so small that the government won't make much from it, and the bill specifically forbids the IRS from taking punitive action for NOT paying it, unlike the income tax.
So as the insurance companies get raked they either raise their rates or drop the whole business, making things worse.
This will lead to public support for further expanding medicaid as I said, AND making the mandate tax bigger and more punitive as those not insured will either be demonized or made into victims of the greedy companies depending on income.
My personal belief about Obamacare is that it was designed by a bunch of demented morons and it is so flawed and unpopular it will collapse under its own weight in several years. Getting it off the ground with 14-17 states not cooperting and half the folks not even bothering to sign up is just going to be impossible. The GOP will sabateauge it at every opportunity. The economic collapse which is surely coming will finish it off.