Why are wages much lower outside of the US?

I’ve been thinking about expatriating, but cybersecurity salaries don’t seem to pay anywhere near what they do in American cities. Why is this? I thought it’s because this is where the money is at, but from what I am seeing, salaries in the UK are almost half of what they are here after converting both to the same currency.

Are there any countries that have a good market for cybersecurity professionals?

american cities cybersecurity don money near pay salaries thinking thought wages