What do you think reduces consolidation? Genuinely curious. I think there are other strategies that will work, but taxation is extremely effective at reducing variance of wealth distribution.
What reduces consolidation ultimately is a real recession. Not these fake ones we have had in recent times which get propped up with QE, but a real recession. The type that kills big companies.
Then in the ashes you will get a verdant crop of new companies started by fresh people and a new period of massive growth with follow.
Might not be a cost that people actually want to pay though.