Tell me you don't know much about how payments are done outside USA without saying so directly.

All of the above are very likely done electronically in Netherlands.

Denmark has an even lower limit (€2700) and there has been no problems with this. Denmark no longer supports payments using checks.

I've never heard of anybody being paid wages in cash in Denmark. It's so uncommon that the Danish IRS even had to explain it is actually possible to do so.