Literal phrase "Why don't they eat meat porridge?", famously attributed to Emperor Hui of Jin when informed that his subjects were starving due to a rice shortage.

晋惠帝在听闻百姓无粮可吃时，竟然反问：“何不食肉糜？”

To be completely out of touch with the hardships and reality of the common people due to one's privileged background.

有些专家建议失业者通过出租闲置房屋来增加收入，这简直是现代版的“何不食肉糜”。