translation.en: But there are endless problems with social gradients that are worse in more unequal countries -- not just a little bit worse, but anything from twice as common to 10 times as common.
translation.zh: 但是社会梯度存在着无穷的问题， 这些问题在不平等的国家显得更糟—— 不仅仅是一点点糟， 而是什么都要差到 2 倍 10 倍。