I agree with Tim about the disadvantages he mentioned in terms of SpaceX’s decision that employees should seek problems to solve. It cannot be denied that the assignment of task should be in the charge of experienced and decisive managers to avoid disorder. However, sometimes employees can come up with creative ideas and some wise clerks will consider problems in different ways to get rid of fixed model. Creation is the source of productivity. Besides, though employers are more judicious, their thoughts and strength are limited, compared to collective power.
In my opinion, the employers can enforce rewards and punishment to avoid chaos and encourage active participation in solving problems. For people who have showed feasible and profitable schemes about an assignment, employers reward them with extra salary while for people who left work undone, employers just deduct their wages.