There are certain rectifications of the world that cannot be accomplished by tzadikim
These people are indifferent to spirituality and holiness; they are concerned only with their own material success; nonetheless, they move the world forward.
The Jewish tradition distinguishes teshuvah out of fear of punishment from teshuvah out of love for the supernal. The latter is founded on the desire to help realize divine paths in the world. It therefore provides the tzadikim with a means to participate in the rectification of the world.
That is, the condition of the world today, in which the needed material rectifications are carried out by those who are wicked or far from holiness, is flawed; and it will be a great blessing if tzadikim are able to do this work. However, the tzadikim are not yet ready; they must carry out deep teshuvah to open this path for themselves.