This is a very Dutch thing, where as a contractor you lose a lot of benefits like 25 holidays, paid sick days, pension, unemployment insurance. But overall you normally get more money, though also more stress.

Compared to USA, Dutch freelancing is more like normal employment. If you get hired by an USA startup, you normally get a much bigger compensation and they often prefer you to be contractor as it fits better with overall HR/contract structure. Though there are in-between firms that would hire you like a normal employee with Dutch benefits, but you lose some money.