Earlier quoted context omitted.
Contract work is a lot more common in Europe for a reason
I don't think I ever realized that's why there are so many discussions of "employment contracts" here on HN (which has a heavy European population, from what I can see). In my entire adult working life in the US, I've never once had an employment contract (and still have never seen one or heard of anyone else with one, either).
As a full-time employee of the company you're working for (i.e. not simply contracted in), you still have an employment contract (it's a right/required) which'll lay out the employment expectations (salary, hours per week, whether you can be required to work additional hours etc).
We do also have contractors - i.e. those who work for an external company who are brought in for a specific project (or to provide easy-to-get-rid-of headcount).
In my experience, working as a contractor isn't all that much more common than in the US. But people having some form of contract is, because basically all employees have one.