The white collar class is handled a different way than blue collar in the work field, because people in white collar jobs are expected to manage and perform in a professional level, and blue collar workers are expected to perform on a professional skill. This is why people in WC jobs usually obtain those positions through academia where you only need knowledge of the position, unlike BC where you need skills and experience.
To finally answer your question lol, people in blue collar jobs tend to be more kind because their humanity is not stripped from them, their jobs are not competitive and they work together, bonding with one another. I've worked both sides before and the job I loved the most was my warehouse job, because I made a lot of companions there. Now I'm a lonely EMD lol
Hope I Helped ^_^