Considering that the Dutch were below average before the second world war, I think your hypothesis is wrong. I think they were just compensating for being tiny during that time.

On a more serious note, I just think the Dutch had zero scruples (inventors of modern capitalism and all).

They just didn’t care how many people they screwed over aslong as they could get one more Gulden in their pocket.

Absolutely a possibility

You are asuming they do physical work and aren’t just white collar.

WAIT, isn’t that the flag of Luxemburg? The blue looks too light for the Dutch flag or the French flag.

Same in Dutch,

“Vijf voor half vier”