Any action that results in taking a life is a tragedy. That it is necessary for people to be killed during a war in order to prevent the slaughter of innocent people is ludicrously stupid in an age where there are enough resources to support the world’s population. Executions during an ongoing revolution fall into a gray area that may qualify as self defense, as letting the person live may result in the deaths of more people.
So if a billionaire is stripped of and isolated from their resources, and sent to be re-educated, they will still lead to more death and misery? There is no possible path to becoming a functioning member of society?