[hgsgm]

Keynes' point is that money stimulates economic activity, breaking deadlocks. Paying people to do useless work is only helpful because it is more socially acceptable than paying people to do no work. In no case is the useless production valuable.

[kube-system]

In a practical sense this is pretty avoidable for the general population, however. Because you just choose something that would be useful, e.g. public works.