The Greeks are a lot more generous than the US government is.
THe US Government wants to control the wealth of all US citizens with onerous reporting requirements and gotcha penalties. We have defacto capital controls rather than explicit ones, both on individuals and corporations. We’re also unique in having worldwide taxation on income.
That said, a Greek citizen would have to be crazy to bring his money back from Switzerland. Where’s he going to put it—in the Greek banking system, where he’d have to worry about a “bail-in?”
I'm wondering when individual stashes of silver and gold bullion and coins will be illegal. And when the banks and govs work to implement a cashless economy.