That's just my (very vague) opinion tho'
I think you may be confusing economic stability with standard of living in which case most of the countries named already do figure pretty high on the list (and there is a list).
Although there are aspects of each factor influencing the other they are not really interchangeable terms.
I'd say a country like Brunai is more eligible to be called economically stable.
The interweb says Brunei is ranked 4th in the world by gross domestic product per capita and has an external debt of effectively zero.
That means it's fucking rich... and doesn't owe anybody any money.
Nice.
It has the second highest Human Development Index among the South East Asia nations and is classed as a developed country.
So it's people are smart and have access to technology.
Also nice.
On the downside it is pretty much a police state and classed as "Not Free" by FH (in fact the country has been under de facto martial law since the early 60's).
But I suspect that the fascist leaning monarchy's tight grip actually plays a large part in maintaining stability.
