Analysis: Although this paragraph is nearly gramatically correct, it is far from the way a native born American would write it. It violates style and voice consistency. People's is correct English, it is just never used; kind of is spoken slang and not written; go a bit more is never used. Suggestion: When a person's effort is combined with others, he tends not to work as hard as he would if his individual effort was measurable. As part of a group, he is more laid back. It's a human habit, so the solution is not to single out the free-riders and punish them, but rather motivate and build up the team identity. [This 'solution' is not perfect, but goes a long way towards expressing the concept correctly] It might be even better this way: Since individuals tend not to work as hard when part of a group, careful atention should be paid to motivating the group as a team with its own identity.