The assumptions are:
1. A uniquely special class of people do all the work that matters. They're astoundingly gifted, talented, and insightful, and have a rare ability to make profits happen by having very special ideas, owning Important Things, and telling everyone else what to do. These prodigies deserve everything. They are not to be criticised or judged by their inferiors. Ridicule only proves their superiority.
2. The work everyone else does is far less important. Most of the people doing it are interchangeable and literally disposable. Sometimes they deserve nice things, in a limited sense, if it's hard to make things happen without them. But mostly no.
3. Negative externalities - pollution, ecosystem collapse, spiralling asset prices, financial and political instability - aren't real. If they are real they don't matter. If they do matter they're someone else's fault.
4. It's absolutely fine to treat other humans with aggressive indifference and outright contempt as long as Number Goes Up. In fact it's expected.