[Shivetya]

It won't be cooperation. Either it will requiring buying off those countries or using coercion which could include anything from tariffs, fees, and penalties, or to even locking them out from access to global banking and assistance.

a global tax lets the countries with irresponsible spending to offload their costs to other countries. pure and simple. it will be packaged as something else entirely but it is no different that what happens internally in many countries between different levels of governments (states,cities, territories,etc)