I think this is a fairly dangerous setup. Having studied a hybrid of business administration and CS I think that people were labeled "slackers" way too quickly

I think this is a fairly dangerous setup. Having studied a hybrid of business administration and CS I think that people were labeled "slackers" way too quickly when it came to programming group work. It's genuinely hard to learn programming for some people which I didn't really appreciate before university. In fact some people are morbidly afraid of it (just like math) and just give up at some point. Since I was already interested in it way before I started university the curse of knowledge was in full effect for me. We tried to get "slackers" involved whenever possible and took it as a sign of failure on our part if we couldn't. This was equally true for true slackers (there's inevitably people that will be lazy and try to cruise). Confronting them and giving them well structured work packages kind of works (and was really hard for me). It's a very good preparation for the workplace. I'm most certainly an introvert and I think people who try to cruise and get by without doing much work are usually extroverts. This is observational evidence, I could be completely wrong but you have to be somewhat good at making up excuses on the spot and talking to people and overwhelming them if you are a "slacking pro".