Murder is Easy - Agatha Christie

Murder is apparently so easy some people make a career of it. What DO the people in Christie's books do for a living? They're all, apparently, independently wealthy and none the better for it. I'd tried to read this one years before but had to return it to the library before finishing it. It was worth the wait. A frighteningly high body count, though, wasn't it? At least for Christie? Seems like this should have been some kind of record for an English "cozy." Caught the TV version the other night and thought they did a pretty good job of it.