Robert Altman went on to become a hugely successful filmmaker; Johnny Mandel scored many more movies. Michael, though, retired from songwriting and focused on his career as a painter. He could afford to. In the 1980s, his dad good-naturedly complained to Johnny Carson that he’d been paid only $ 70,000 for directing the movie, while his son had become a millionaire from the song.

Robert Altman went on to become a hugely successful filmmaker; Johnny Mandel scored many more movies. Michael, though, retired from songwriting and focused on his career as a painter. He could afford to. In the 1980s, his dad good-naturedly complained to Johnny Carson that he’d been paid only $ 70,000 for directing the movie, while his son had become a millionaire from the song.
http://www.neatorama.com/2015/07/28/MASH-Notes-The-Story-Behind-Suicide-is-Painless/