You show you lack of world knowledge again. There are 175 or so countries in the United Nations. Most of them are small, under 10 million. And most of them are a basket case economically. Vatican city is dirty, with outdated infrastructure. I seen it with my own eyes. I have probably visited more countries than your age.
Singapore was not rich while the British ruled it as a colony. It had serious drug problems. Then they took a different path. They eliminated government benefits to working age adults! There is no welfare for those, zilch, zero, nada! There is no entitlements! Singapore spends tax collected on infrastructure to promote industrial growth. Corporate taxes are lower than other industrial countries. That is one reason illegal immigrants do not sneak in because there are no freebies unlike Unite States to illegals.
And they control illegal immigration via 2 year work permits. Employers can not hire foreigners without a valid work-permit.
US policies are diametrically opposite. We give free medical benefits, free k-12 education and lunches, food stamps, and other benefits to illegals. It has nothing to do with size of a country. It has everything to do with insane policies. Your English comprehension is very shallow because I am diametrically opposite of promoting unwanted illegal immigration. I have posted as such hundreds of times. I only want over funded and over educated immigrants.
You are back in ignore. I am tired of explaining simple facts to you.
Gee, you went to Singapore and now everything in your life has to be about Singapore.
Including America and Mexican immigration.