The article ends with saying that a 4-day work week will solve the problem, but it won't.
The issue isn't that Rebecca from the article needs to work 70+ hours, and they would be completely fine if it was "only" 64 hours. The issue is stated plainly in a quote earlier on in the article; Salaries have not increased at the same pace as the cost of living. No one should need to work 2 jobs in order to survive. Going from 70+ hours to 40 would be a much bigger change in the lives of the people in the article.