The most valuable commodity in the world is power: the ability to get others to do what you want. Even if all you want them to do is leave you alone, it still requires you to have power to prevent them from coercing you.

Power is always relative. Being a millionaire does not give you unbridled liberty if everyone around you is a billionaire.

Thus there is a natural incentive to never have enough. It's always useful to have more if for no other reason than to prevent bad people who would harm you from having it instead. This means there is a natural incentive to create scarcity for others.

Good culture and institutions can mitigate this but there is no natural stable equilibrium where we can all automatically live in peace without effort.