Vocabulary is loaded. The words “rich” and “poor” conflate munificence with success or happiness. When we see an injured animal and say, “That poor creature!”, we are obviously not talking about its bank account. By the same token, being short of money is a problem but it absolutely does not make you a “failure”.
It was never popular even in France, for a simple reason: the week became 10 days but the weekly rest day was still only 1.