I like the idea that someone pitched in a previous post... spend the money on something else like... pilot mental health, cabin crew threat identification and management training, drug and bomb sniffer dogs... anything but the useless screening equipment at the doors.
Don't get me wrong, aviation security needs continuous improving and monitoring which is an idea I support, but creating screening for the sake of "we have to do it, why don't they?" is rubbish.
I only hope the government and its agencies have the foresight to know how ineffective door and gate screening could be if they yield to ALPA's whim-of-the-day... and I trust they will.