This is not a pervasive opinion. The prime minister has directly sued personally anyone who attempts to investigate the state wealth fund and there is a lot of questioning about the motives and conflicts of interest among Singapore's ministers and their families.
The lack of free press, and that it is illegal to investigate these government activities, is worth noting as well.
Note this ranking is based on "perception of corruption". Given that Singapore is a one-party state with extremely little press independence (https://theindependent.sg/singapore-in-bottom-20-countries-i...), citizens would be less likely to hear of any major corruption that occurred as the media wouldn't report it.
As an example, PM Lee's wife was CEO of Temasek, the national investment company, for many years. Consider, of all the five million plus people in Singapore, what is the probability that the prime minister's wife just happens to be the most qualified of anybody in the country to manage the country's money?
She somehow also finds the time to make hundreds of Facebook posts a day: https://www.reddit.com/r/singapore/comments/g33rvv/how_is_ho...
I spent some time there and I honestly believe that corruption is probably on par or better than other developed countries. They take it very seriously.
However, as you mentioned, if there was corruption, you’d probably never know. With the libel laws and control of the media, I doubt many would be willing to speak out.
Singapore’s system has worked so far, but all it takes is some corruption within for the whole system to rot to its core. It’s not setup to self-correct. It seems like a well oiled machine on the surface but that’s just because you’re not allowed to see all the warts.
Probably irrelevant, but I wanted to add that Ho Ching is his second wife. The first Mrs Lee died three weeks after giving birth to his first son [1].
[1] https://wiki.sg/index.php?title=Death_of_Wong_Ming_Yang_(198...
Singaporean here. It's mostly "reputable and highly regarded" if one gets a top-tier government scholarship [1], since that leads to civil service postings with more exposure and chances to take credit.
Everyone else is just a "farmer" [2][3]. :)
[1] https://www.quora.com/Are-scholarship-holders-more-likely-to...
[2] https://www.mycarforum.com/forums/topic/2675951-lousy-schola...
[3] https://www.reddit.com/r/singapore/comments/7p5unh/degree_ho...
Does Taiwan count? I would hardly say it has diminished or fallen apart. Of course, that is only my humble opinion.
It's known that the ruling power in Taiwan is descended from the Nationalist government, it's perhaps less well-known that Sun Yat-Sen was a serious political thinker who designed that government, effectively singlehandedly.
https://en.wikipedia.org/wiki/Three_Principles_of_the_People
There's a visible mix of Western (by way of America and Britain) and Chinese thought in how the Yuans are structured.
Taiwan also inherited a large and functional civil service from the Japanese occupation, this is less immediately obvious in the structure of Taiwanese government, but you can find small traces everywhere if you know what to look for.
From what I’ve experienced, the lack of corruption in Singapore is partly cultural and partly due to their heavy penalties for crime.