The disparity is massive, the company I work for has an eu office (in an enormously expensive city) as well as an office in California, in an area overall less

The disparity is massive, the company I work for has an eu office (in an enormously expensive city) as well as an office in California, in an area overall less expensive than the EU city. I found that an interns salary is the same as my base salary, which was fairly insulting, but the full time engineers got similar stocks/bonus but in addition also get about 2.5 - 3 times my base salary, while paying less tax in a slightly less expensive city. I found it quite upsetting.