There is always an implicit tradeoff of working in company A with one tuple of salary / working environment, or working in company B with another tuple of salar

There is always an implicit tradeoff of working in company A with one tuple of salary / working environment, or working in company B with another tuple of salary / working environment. If we eliminate tuples that are dominated by others then we end with a curve of equipreferencial points, representing such tradeoffs. If such tradeoffs are offered by different companies, there is no reason why they should not be also offered as by one company.