Right! Exactly! But would you agree that when you are working in an oursourcing company and projects change sometimes a few times per month - you are less motivated to think about being proud compared to just submitting the hours in time?
But now you're comparing employees, not employees and contractors.
In my last two startups I had people over 40 working those long hours. A lot of contractors I know are lazy young guys that want the buck with minimum fuss.
Most contractors are experience ex-startupers - this sounds statistically incorrect ;)