To use economic jargon, a community, like any individual, faces an indifference curve between different needs, and should be free to choose the optimum trade-off.

• 借用经济学的术语,整体社会与个人一样,对满足本身不同需要都有一条所谓的无差异曲线,而且应该有自由在曲线上选择最适合自己的一点。