Very often people put "income equality" above "income mobility". The authors reward is a meritocracy...is it just? No. Is it fair? Yes in my opinion.
The authors reward creates upward mobility for people who focus on providing value. Curations reward centralize power in order to incentivize the curator to do a good job and care for the long term viability of the project.
ALSO, if marketcap stayed stable, this would be a 0 sum game where value is constantly reshuffled among users.