Not sure you read all my comment, but Singapore explicitly excludes many of its residents in its worst living conditions from official tallies.
If your larger point is about treatment of immigrants, how do you feel about US taxing its immigrants as citizens after 1 yr of stay, but putting them on a line to actual citizenship that could be more than multiple lifetimes long? Didn’t we fight a war about “taxation without representation”? I’m not even talking about literally tearing apart poor immigrant families while all along extracting taxes from them.
> line to actual citizenship that could be more than multiple lifetimes long
I'm not sure what you are referring to: almost every immigrant I know in the U.S. who wanted to pursue citizenship got it after at most 7 years in the country, sometimes less. That's a normal time range for most Western countries.
https://www.uscis.gov/sites/default/files/document/guides/ch...
Regarding immigrants, you need to meet more of them to get a better idea. The situation in US is much worse than most western countries. I encourage you to read up on why it is such a massive political issue (Obama's attempted reforms and executive orders, Dreamers, Path to citizenship etc.). Here is one example: https://www.cato.org/blog/150-year-wait-indian-immigrants-ad...