What the anti corruption crusaders are likely to unearth might be a very tiny fraction of tiny fractions of illegitimate wealth. They can do nothing as activists themselves. The financial and other powers these people are too powerful to bring them down. The only other way is to go the political route which Arvind Kejriwal is doing now, but we already know to do anything big in politics you will likely not be able to do it, unless you are corrupt yourself and allow donations from other shady sources.