Such economic pressure is no more coercion than are the hunger pangs that remind you you need to eat. Coercion requires intent, so a natural system cannot be coercive.
This sounds like you'll need some enforcement mechanism, because you're never going to have a world where a certain percentage of the population isn't intending to be coercive.
Truth, partial
Mechanisms exist to deter "those who are coercive" which require no "enforcement".
Enforcement == coercion and devolves.
Alternatives to coercion are numerous.
