While I am in no way defending DHL's practices which I think are wrong for other reasons: How does an employee having to buy their own healthcare mean I pay mo

While I am in no way defending DHL's practices which I think are wrong for other reasons: How does an employee having to buy their own healthcare mean I pay more tax? How does DHL buying healthcare for employees mean I pay less tax? How do either of those affect my socialised healthcare charges which would remain fixed even if DHL cease trading?