Not that difficult. But Singaporeans tend to be very nationalistic due to Communist China and India flooding the country with low-quality technical workers, similar to the H1B scum coming into the USA.
Indian Indians tend to riot a lot there as well and love to rape locals and foreign domestic workers from Indonesia and the Philippines.
Muslim Malays have special privileges. Halal crap food all over the place.
The Singaporean PR is not difficult, but you will pay 35% of your wages into CPF.
Forget about driving. The COE (permission to own a vehicle) costs well more than the vehicle itself.
That is not what I found out when I was in Singapore. There were no riots anywhere, great food from many countries. I enjoyed Indian restaurants, Arab restaurants, Chinese restaurants in Singapore.
The foreign workers can only stay 2 years. Then they MUST leave Singapore and re-apply for the 2 year work visa. From what I heard foreign workers love the higher wages in Singapore and avoid getting in trouble because then they are black listed for life and can never come back.
Speaking of rapes, US has one of the highest rape rate per capita of any industrialized country. And the highest armed robbery rate.
That is not the case with H1-B visa workers in US, who do not need to leave the country to extend the visa.