My response would be “how many people do government regulations have to kill”? The very basis of Libertarianism is that the only moral function of government is to protect its citizens against force and fraud. If you own a restaurant so poorly run that it kills people, Negligent Homicide is a perfectly justifiable ruling. And in closing, you’re obviously confusing Libertarianism with Socialism or Marxism. We absolutely do not believe that we should all work for the “collective good”. Quite the contrary. My ONLY social contract with you is not to commit force or fraud against you. Otherwise I owe you exactly squat. If we “work for the collective good”, its because we realize that society is a survival benefit for us, and anything done for the “collective good” is completely voluntary.