The purpose of 5 is to improve science not ‘reward scientists’ [1]. If we moved to a system where the raw data was shared automatically then the number of “exclusives” any group could get from a study would decline, but the value of each paper would go up. As long as everyone was sharing then I don’t think funding bodies would stop funding groups willing to go to the effort of doing large studies. It is the funding that determines what research is done, not the how many papers a group can milk out of the study. It should be quality over quantity.

[1] For those outside of science what happen now is groups with the data hold back the data and then use access to the data to establish “collaborations” - basically they will give you access to the data as long as you put their names on any resulting papers. The people with the data often don’t actually contribute anything to the new publication other than access to the data and their names - my old boss was a expert at doing this.