Team incentive systems should take these values into account, rewarding U.S. developers with money and French developers with time off.
I would have thought the opposite a better strategy. Reward time-poor Americans with time off and time-rich French with money. I’m an American developer and I would much rather have more time off.
I imagine it’s more to do with taking a single company offering and making it match the existing-company culture of the worker’s locale. So if the company is a US originated company and offers just two weeks of vacation then the employees outside of the US may prefer to sacrifice some of their income to get back up to vacation parity with their local peers. Whereas in the US it’s already the normal and assumed that money would be greater appreciated