Oil Spills, Tort Law and Libertarianism

Here is Paul Krugman's Nth reason why libertarianism doesn't work:
Thinking about BP and the Gulf: in this old interview,
Milton Friedman says that there’s no need for product safety
regulation, because corporations know that if they do harm they’ll be
sued.Interviewer: So tort law takes care of a lot of this ..
Friedman: Absolutely, absolutely.Meanwhile, in the real world:In the wake of last month’s catastrophic Gulf Coast oil
spill, Sen. Lisa Murkowski blocked a bill that would have raised the
maximum liability for oil companies after a spill from a paltry $75
million to $10 billion. The Republican lawmaker said the bill,
introduced by Sen. Robert Menendez (D-NJ), would have unfairly hurt
smaller oil companies by raising the costs of oil production. The
legislation is “not where we need to be right now” she said.And don’t say that we just need better politicians. If
libertarianism requires incorruptible politicians to work, it’s not
serious.In other words, libertarianism can't work because government sucks. I am tempted to comment further on this creative line of reasoning but that is unnecessary since Paul has misunderstood the facts of the matter.The Oil Pollution Act of 1990 (OPA), which is the law that caps liability for economic damages at $75 million, does not override state law or common law remedies in tort (click on the link and search for common law or see here).  Thus, Milton Friedman's preferred remedy for corporate negligence, tort law, continues to operate and there is no doubt that BPs potential liability under common law alone would be in the billions of dollars.  Thus, Paul now has only (N-1) reasons why libertarianism doesn't work.Moreover, Paul has actually been too unkind to government, a defect it falls upon me (!) to correct.  The point of the OPA was not to limit tort law but to supplement it.Tort law, as traditionally understood, could only be used to recover damages to people and property rather than force firms to pay cleanup costs per se.  Thus, in the OPA as I read it--and take the details with a grain of salt since I'm not a lawyer--there is no limit on cleanup costs.  Moreover, the OPA makes the offender strictly liable for cleanup costs which means that if these costs are proven the offender must pay them regardless (there are a few defenses, such as an act of war, but they are unlikely to apply).  The offender is also strictly liable for up to $75 million in economic damages above and beyond cleanup costs.  Thus the $75 million is simply a cap on the strictly liable damages, the damages that if proven BP has to pay regardless.  But there is no limit, even under the OPA, on economic damages in the event that BP failed to follow regulations or is otherwise shown to be negligent (same as under common law).