Why ship the checked bags with the plane? Why not send them next day to wherever the passenger is going? Drop it off at the curb with an address and ship it. No screening, no worries, take advantage of an existing infrastructure. Fed Ex, UPS, and the USPS have been doing this reliably and cheaply for years. I suspect when all the redundancy is eliminated from the system, and all the extra security measures are dropped, the cost difference would be negligible. This would also cut down on theft. If the bags are sealed up, as the don’t need to be opened to be inspected, it makes it much more difficult to pilfer items from them. Perhaps an industry that isn’t on the ropes may be able to profit by assisting a vital industry that has been in trouble for years.