The most damaging charge against the two men is that they risked their country’s fortunes to feed their egos. 引述分句倒装，是由于直接引语短的原故，所以谓语前不加逗号吗？

按常规是需要加的。但由于这是括号里的补充说明，省略也是可以的。和作者写作习惯有关。