Because the thousands of lives were never entitled to how someone decides to spend their money in the first place, and if you believe otherwise then this literally applies to everyone and their income. Example: How can we justify going out for an ice cream, when that same money could be spent to vaccinate several people from malaria and save their lives? Why is it ok for middle class earners to spend money on frivolous things, but not for the wealthy? All that surplus money can save tens of thousands of lives!