I suspect in the vacum of space your 737 example may work but on terra firma we have gravity to deal with and yes 50K of thrust is capable of lifting 130K of aircraft but for how long? If fuel were free and limitless then maybee it works? I stand and wait to be corrected for there are far more inteligent people than me out there. As far as I know Newtons laws are infallible i.e as the wise man always said you dont ever get anything for free! Every action and all that!
Regards
Keith