2. Money: Ok we may not need money, but some form of system to make sure the population is doing things that are needed to be done. Jobs that are in shortage but high demand get paid more. Jobs which can be easily filled and are not needed much get paid less. With no incentive people will tend to trend towards the jobs they want to do. So we get a lot of bad poets and street musicians.
This was kind of the point though. Automation had progressed to the point that nobody had to work if they didn't want to, or they could be street musicians and still have a good life.
Obviously it's not completely post-scarcity. Not everybody can have their own Galaxy class starship, or their own planet, etc... But it's more like a souped up socialist paradise where everybody has a guaranteed minimum quality of life and if they want to improve their life they can but if they don't then they won't starve to death or freeze or even have to worry about money. There are no shitty jobs, they've all been automated or replaced by replicators.
Money cannot buy love, nor even friendship.