[A. Pole]

"The wages are only a part of the cost and making pair of jeans takes less time than five hours."

Let me guess: you have never run a business.

Let me guess too, if you were running a business producing one pair of jeans a day, you must be out of business by now?

[BeHoldAPaleHorse]

Labor costs are considerably higher than their hourly wage. The fact that you did not know this demonstrates that you have never run a business.