Does Goldman sign contracts promising to disclose all potential conflicts of interest when they help with an IPO? Does Goldman have a history of violating those

Does Goldman sign contracts promising to disclose all potential conflicts of interest when they help with an IPO? Does Goldman have a history of violating those contracts and paying $30 million to settle the case? Does Goldman have a very recent documented history of corrupting government officials and leveraging them to make money? I guess it wouldn't surprise me, but all those things are definitely true of McKinsey.