Not every company gives summer and winter breaks. These companies also have awful leave policies (on average less than 10 days for companies with breaks). None

Not every company gives summer and winter breaks. These companies also have awful leave policies (on average less than 10 days for companies with breaks). None of them provide sick leave (you must use your standard leave for sick days). Overtime, until very recently, went uncounted and was unpaid. So the statistics you quote are almost certainly very wrong. Recently the government has been cracking down on overtime (and especially on unpaid overtime), and requires companies to track overtime. It's only considered excessive overtime if it's more than 45 hours extra hours a month, to give you an understanding of just how much people are working.