Any solution that begins with "Everyone has..." is going to raise the question of cost. What's that rule that some systems which attempt to achieve 100% coverag

Any solution that begins with "Everyone has..." is going to raise the question of cost. What's that rule that some systems which attempt to achieve 100% coverage will approach infinite cost? Travelers pay a high price for the complex air travel reservation system we have now. Poor people don't fly on airplanes, but poor people will have to vote.