I vote scrapped. You would have a hard time trying to reform the mindset of the present administration or employee.
I advocate the airlines taking control of security. I am not sure if I would want the government involved too much, as we have presently seen what happens when the government has total control. The airlines would have a vested interest to their customers to provide a secure flight without invasive and unproductive security measures.

Truly secure the sterile area, search ONLY for WEI, and skip all the nonsense.

I also think we focus way too much effort on airline security. There is no way to be 100% safe, so we must calculate the return on investment for each new security measure that seems to come about because some yahoo somewhere did something. The government also seems to only react to selective happenings, usually failed attempts, that alter security measures for years after the fact.