(Many of) the bishops are a big part of the problem. So writing them is an exercise in futility.
Recall that Archbishop Weakland of Milwaukee was caught paying many hundreds of thousands of dollars in hush money to his gay lover. Without the theft we never would have known about it, so who knows what else is going on among some of the other bishops.
The good bishops are already cleaning house (see the recent articles in National Catholic Reporter attacking Bishop Finn in Kansas City for doing this.)
For the rest? Well, all we can do is pray for orthodox bishops.
You are sos right, jtal. Prayer is our ONE most powerful weapon!