GP said nothing about taxing, only "having a say". But standards can cost more. Lots of people grumbled about about paying extra for those damned gold-plated hi

GP said nothing about taxing, only "having a say". But standards can cost more. Lots of people grumbled about about paying extra for those damned gold-plated hippy mufflers, etc. A single big state can and will enforce a product rule in their state, with the explicit knowledge that by doing so they will cause a change in the other 49. Many smaller states explicitly default their rules to some other state, eg Texas teaching.