If the group collectively decided each individual's share, would it change the amount of fruit you gathered?

Unfortunately it would.

Explanation:

As great as communism could be, this seems to be the weak link. A lack of individual incentive

Lets say, we have an amount or level of fruits inside a given parameter with us and a group of people are required to be well supplied by the optimum level of share or number of fruit if it was a group of people who worked for collection of fruits that they possess at the instant of time. So, we would just it wont change the amount of fruit that each person deserves inside a group or number of individuals who are taking part in the activity. So, we can just the total amount of fruit will be well distributed among all the individuals. As each person will have a fair amount of fruits in there baskets.