In England, actuaries make considerably less than they do here. The cost of living is higher in England. And, the tax consequences are not favorable. In Australia and New Zealand, actuaries also make less than here. In Bermuda, Continental Europe and Asia, however, salaries are higher.
Some companies pay in U.S. dollars and then adjust.
Others pay in their own currency. In a lot of countries, there are very large housing allowances. And, often there are favorable tax advantages. United Arab Emirates pay North Americans very well to go there. Non-traditional actuarial jobs really don't exist and health actuaries are not in demand.