If your colleagues, clients, or bosses don’t get why working less is a better idea, leave. There are far better places to be than at a company that values quantity over quality.
I absolutely love articles like this. Actually, I love people who think like this. It's been my experience that working a lot, doesn't mean you're producing a lot. Over time, I've tried to work smart, and try to get more done in a smaller amount of time.
This article hits home a bit closer today as I try to loose weight. Two years have gone by, and I've gained 100 lbs. Why? Because I was so focused on work, I forgot that it's only the means to live my life; not the reason to live life.
If you haven't, you should read the original article.