A job is a job, whether you are a doctor or a cleaner. You have no right to mock someone just because you are earning more money than the other person. We are all trying to put food on our table. Meaning you don't have to laugh at a person because of the kind of job they are doing or the amount of money they make.
Many people put effort into their jobs the way people in big offices do. So, they don't need to be mocked. Instead, we should learn to respect people regardless of their job. Even if they do dirty jobs and you work in the most expensive office. In the long run, we are all trying to survive.
Life isn't a bed of roses. So, you shouldn't expect things to go so well for everyone. Just do your part by respecting people's jobs, even if you don't see it as anything. Just remember, A lot of people work hard regardless of the kind of job they do.