People are often forced to as many live from salary to salary. My country had a genius idea to reduce longest sick time doctor can prescribe without commission to two weeks from previously two months. Imagine how great that must be for everyone having to work their asses off. Especially considering that a lot of salaries are minimum wages and the rest of the salary is tied through KPI bonuses and stuff. So if you miss a day or two a month there goes majority of your salary.

And some might not have a choice, especially in US.