Many people go to places like Singapore and pay out of pocket for 1st-world healthcare, that is affordable, rather than deal with the US system.
However, Singapore has massive amounts of government guidance in their system. They force all workers to contribute 20% of their wages into a health savings account, with a matching 17% by their employer. Really hard to compare Singapore to the US though. Singapore has vastly more government regulation in guiding what hospitals can do, and other healthcare concerns. One of the most obvious ones, is that you have to opt out of donating your organs at death, government already mandates your a donor.