> If someone is competent enough to sustain 2 jobs, they will also get quickly promoted to 2x their salary if they are working one job. I don't know the number

> If someone is competent enough to sustain 2 jobs, they will also get quickly promoted to 2x their salary if they are working one job. I don't know the numbers but in my limited experience, in western Europe, this is just not possible (or very very rare among C level people if any, not mere engineers). A good senior salary (gross) is like 80K Euro/year. As a senior engineer working in Europe, you cannot expect reach 100K Euro easily. Now, thinking that you can go from 80K to 160K just by being an engineer that is "competent enough" is just plain naive. Not even the CTOs are making that around here.