This word is generally not used for a single person, but to describe a social state. Didn't the sketch say that the people live and work in peace and contentment and praise the leadership of the party? We don't discuss whether this is to promote the main theme of society or flatter others. As long as we say the word "live and work in peace", it won't be awkward to use it. But if someone lives and works in peace and contentment now, it feels a bit wrong, because the scope of this word is too big for individuals.
The above is just a literal explanation of living and working in peace and contentment. So in this excellent situation, do individuals really live and work in peace and contentment, or do they feel that they live and work in peace and contentment? This varies from person to person.
Some people in this society don't live, at least they don't have a fixed residence. More common in people who have just graduated from college or are unwilling to be mediocre. If they have money, they will not want to live a quiet life, but spend it all. As for where the flowers are, it's hard to say. For such people, they may feel happy, but it is definitely not possible to live in peace.
What about happiness? This is actually more difficult than settling down. You can go out on the street and ask anyone if they like their present job. I estimate that nine times out of ten, the answer is unsatisfactory, that is to say, being able to do business happily is basically something that only a few people can do, and most people have to do it, without the initiative of "I want to do it".
Therefore, living and working in peace and contentment generally exists only in documents or words, just like the ultimate ideal of the great proletariat: a beautiful capitalist society.