I'm afraid he is just calling a spade a spade. There may not be a smoking gun for the allegations but the truth is there. It is just masked in smoke and mirrors. You don't need a broker other than to help you when you first arrive and any of them can do that.
Wasinc deserve a little pressure they have really shafted the pilots they supposedly represent at SZAir anyway.
Now they will represent pilots to HKA which you don't even need a broker to go work for them.
I would never recommend using Wasinc unless as a last resort.