“The principle that the end justifies the means in individualist ethics is regarded as the denial of all morals. In collectivist ethics it becomes necessarily the supreme rule; there is literally nothing which the consistent collectivist must not be prepared to do if it serves “the good of the whole,” because the “good of the whole” is to him the only criterion of what ought to be done.” Hayek, Road to Serfdom, Chapter 10
Because sometimes it's serious.