 Starr and his wife left on 1 March , after a ten @-@ day stay ; McCartney left after one month due to other commitments ; while Lennon and Harrison stayed about six weeks , then left abruptly following financial disagreements and rumours of inappropriate behaviour by the Maharishi . Harrison later apologised for the way he and Lennon had treated the Maharishi , and in 1992 gave a benefit concert for the Maharishi @-@ associated Natural Law Party . In 2009 , McCartney and Starr performed at a benefit concert for the David Lynch Foundation , which raises funds for the teaching of Transcendental Meditation to at @-@ risk students . 
