Author here. That's interesting, as I've not worked with healthcare too much.
Others here have cited segregation of duties, which is definitely a factor, but the other one less mentioned in finance is the 'one throat to choke' principle: it's simpler from a management and regulatory perspective to have the responsibility for failures in one place rather than across many teams.
Others here have cited segregation of duties, which is definitely a factor, but the other one less mentioned in finance is the 'one throat to choke' principle: it's simpler from a management and regulatory perspective to have the responsibility for failures in one place rather than across many teams.