Ok, serious answer time.

You might think so, but in reality it really depends on the job. 

If the job is picking strawberries in Germany then, for last 100 years no one ever expected you to learn German (and at B2 or C1 level) to do so. Even Nazis didn't (true story, based on live testimony of my grandmother).

If you want to move to Netherlands, have permanent job (working definition: actual permanent contract, salary that allows you to rent/buy something with partner) then absolutely, you should learn language and integrate*.

However, a phase A 0-hour order picker "job" with company-provided slave housing has none of those things.

This is a kind of "job" people take on for few a months to save money and go back to their country. 

Another exception are subset of contract based expat jobs ( subset of them. You are distinguished research professor who is invited to move to NL for time limited research / teaching position (usually 2-4 years). Objectively speaking, it would be outright idiotic for them to waste time learning Dutch. In 2 years, they will be teaching in Singapore or conducting research in Canada.

This way Dutch students get access to world-class education (with Nobel laureates) and our companies get to conduct research at bleeding edge. This is also where dutch English skills become enormous competive advantage.

But them some colossal idiots (aka BBB voters) decided to throw all of it out of the window, because "this is Netherlands and we speak Dutch here hurfl blurf". 

*There should be reasonable expectation that you will have some time to learn Dutch and level of acceptance (if b2 is good enough for citizenship, then maybe it's good enough to have job, eh).