One of them commented that he doesnt know how I stay inside and work all day, he really enjoys being outside with the trucks in the morning, then enjoying the afternoon outside with the kids.

He could be taking the local kids out for hikes in nature instead - an activity which also gets him outside, provides a benefit to society, and lets him spend time with his kid and their friends. If he didn't get paid, do you think he would prefer picking up garbage, or going on hikes with his kid? And even if he finds picking up trash meaningful now, do you think he started the job for the money, benefits, and schedule, and then learned to appreciate the good he was doing for the community after years of doing the work?