Absolutely. You reminded me of the pain I blocked out from the project - at the end client decided to go international and now needed to pay people everywhere through separate entities after swearing they never would at the start.

Sadly the "global" payroll vendor did not have a global, multi-entity solution, and required individual accounts to be setup in each country and reconciled.

Creating a new multi-tenant, multi-entity, multi-country compatible mainframe is maybe something that needs further exploration.