It's not just the monetary instrument, it's also the rules of international trade. Bilateral/multilateral "free" trade agreements are created to enable capital to move across borders while movement of people/labor is limited or less privileged.

For example, you can relatively easily buy citizenship in the US, canada, most of europe, etc if you have enough capital. But if you are a person or worker, you have to jump through a lot more hoops to get citizenship in another country.

The world is capital-centric rather than people or labor centric.