Aristotle on Mixed Economies
Capitalism is the only system that allows for both of these. We should not stop advocating capitalism, nor should we stop caring about ourselves and others in peaceful, voluntary ways.
I find it no less disturbing when someone says both capitalism and socialism are extreme and they seek a middle ground than if someone were to say both love and cruelty were extreme, and they therefore seek a middle ground. Some vices or virtues are found in moderation; some are found in absoluteness. As Barry Goldwater famously said,
Extremism in the defense of liberty is no vice! — Moderation in the pursuit of justice is no virtue.
Capitalism is just. Socialism is unjust. There is no "messy middle."