It could succeed if foreign income is tax exempt for an indefinite period after paying that gold card.
Exactly this would be minimum requirement I would say.
One big problem is that it would only apply at the federal level. (Blue) States with income tax are very unlikely to exempt it as well.
True so they would need to avoid blue states and maybe move to Florida, Texas and Las Vegas. I would say 99% would move to Florida for weather and also to moor their superyachts