Interesting that they didn't declare what would happen to those who refuse to accept the offer.

There are other ways to make them cough up the money, but it'll probably piss off the exiles even more and no idea if Singapore will bend like Switzerland did to the US. Besides, if the government took over those companies it wouldn't close down overnight. It'll be a slow decay unless they find someone capable to take over. I'm sure there would be less-rich Indonesians interested in taking over but that'll spook investors.

In the long run, yes, the tycoons do lose since Indonesia's economy is booming. They can be either a part of it or settle for what they have.

Doesn't change the part where they cannot directly benefit much from Indonesia's booming economy.

The same reason companies are investing in Vietnam; to cash in on a developing country. The others you've listed are already developed and very competitive. Besides, doesn't negate the part where I said the tycoons risk losing out on Indonesia's boom if they don't return.

They made their money in Indonesia and they still own companies in Indonesia. It's not like they cashed out, packed everything and left. They can still make money based on what they currently own but they cannot freely expand capital on their own since they'd have to declare the source of the money. They know Indonesian market. They have an advantage in Indonesia. They know how to make more money there. Isn't that the reason the Indonesian government is tempting them with a flat 5% tax? Even Trump promised to offer American MNCs the same deal (at a different tax rate) if he gets elected.

You're disregarding the part where many of those tycoons still hold companies and some portion of their wealth in Indonesia. They're still Indonesians. Besides, not all those tycoons are residing in Singapore. The offer applies to even those currently living in Indonesia but have dabbled in tax evasion in the past.

As long as they don't evade taxes, sure. That's the reason the Indonesian government is offering amnesty, other than getting a portion of the previous outflow back.