I've worked at companies that have offices in Toronto, Canada (where I currently live) while their main offices are abroad (US and Curaçao). They seem to have

I've worked at companies that have offices in Toronto, Canada (where I currently live) while their main offices are abroad (US and Curaçao). They seem to have have a lot of problems with us having different laws and regulations than them (eg: healthcare, holidays) and we're only one country. How does that work when everyone is from different countries?