Complex sentence: Unger argues that it is not enough to regulate the market or compensate for its inequalities through retrospective tax and transfer, but that it is necessary to change the institutional arrangements of the market so that individuals are economically empowered.
Split into simpler sentences: Unger argues that it is not enough to regulate the market or compensate for its inequalities through retrospective tax and transfer. Rather, it is necessary to change the institutional arrangements of the market so that individuals are economically empowered.