I had a coworker who lost a lot of weight and showed up at work one day wearing new clothes and looking sharp. The pants were from Costco. I have since gone and bought a few pairs of pants from them. They feel fairly high quality, made of sturdy and comfortable materials, and are wife-approved. And of course they are very inexpensive.

I'm sure expensive pants have their benefits but no matter how much money I have, I will always baby expensive things, and it's very inconvenient to baby clothes (e.g. must be dry cleaned, can't use a washer or dryer, can't risk getting stains on it). There are good reasons why dads gets their clothes from Costco.