You can just put in the trade agreement that the goods are subject to tariffs unless the workers who made them are paid enough. The USMCA, for example, has requ

You can just put in the trade agreement that the goods are subject to tariffs unless the workers who made them are paid enough. The USMCA, for example, has requirements along these lines for auto assembly (https://www.dol.gov/agencies/whd/usmca https://www.dol.gov/agencies/whd/usmca).