Singapore is a western (like) country and has no capital gains tax. Though as some other commenters have noted, i don’t know if the IRS would consider it legal for a US citizen to bail and not pay the tax.
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It is a tiny city, but it has a massive role in Southeast Asia. I have lived there before and lived a great life without being rich by US or Singapore standards. The national language is English. They are by all means a capitalist country. It is a modern high tech society. Very western if you ask me.
The only way they aren’t that I can think of is that they are not a democracy.