There might not be an objective answer to this question, but I would argue that all members of the society benefit from the mixed economy.
Mixed economy, as opposed to command economy, provides people - all the people - with more freedom, and this is good for people's emotional well-being - having the possibility of making choices is beneficial to us.
On the other hand, mixed economy, unlike pure capitalism, provides people also with security and better public infrastructure, from which again, all people can benefit.
