The one example I’m familiar with is a name brand ice cream company that produces the store brand ice cream too…in that case the recipe is different, cheaper ingredients to cut costs to the bare minimum. But using the machines for a higher volume saves money.
I’m sure ‘same exact item’ does happen too but just ‘same manufacturer’ doesn’t mean exactly the same item.
It was always short sighted tax policy. We’re just living with the blowback.
http://archive.wilsonquarterly.com/in-essence/why-america-got-malled