Primal Scream When the Bomb Drops

Primal Scream showcased two songs from the forthcoming Riot City Blues lp on the album chart show - the second song after Country Girl was When the Bomb Drops. Sounds like they ripped the backing music off 'Rollercoaster' by the Thirteenth Floor Elevators. I was horrified and disgusted. Why is it that bands these days think it ok to be unoriginal and plagiarise things so readily. Post modernism? It stinks.