...which goes to illustrate the complexity of most ethical issues that arise out of social systems. Oftentimes, something that seems cruel to an individual within the system is actually in the best interests of the participants of the system as a whole, and sometimes can even be in the long-term best interest of the person themselves. And then whether you view such features as cruel & unethical or necessary & beneficial depends on your perspective & role within the system.
(This could also be taken as a synecdoche for capitalism itself, which on a micro level is about as cruel as you can get - individuals compete in a race to the bottom to do things more cheaply, and nobody will help you unless it serves their interests too - but on a macro level is the most effective system we know of for satisfying consumer wants.)