Doctors, especially young doctors, are not the wildly greedy people you paint them to be. There are dozens of easier paths to riches these days than medicine and we all know it. My medical school is "cheap" and tuition + cost of living is ~$90k/year. Then, we have 3-7 years of residency before we start making the real money which is less than any generation of doctors in 100 years. I could become a senior software engineer at a Fortune 50 company in less time than it takes to graduate medical school and be better off financially than most doctors. Ask me how I know.
"But even a very small percentage of wildly greedy people can damage a system severely."
You are close to placing the blame in the correct place. My emergency department was just bought by a private equity group. There were 28 doctors. Most of whom worked there because they could spend adequate time with patients and work a reasonable schedule. After the PE company bought us, they mandated less of EVERY position from CNA to MD. The MD headcount is now 11, and the 17 physicians who are looking for jobs are having a tough time (relatively) because most other emergency departments in the area are also owned by PE firms who care about money over health outcomes. Those are the greedy people damaging the system you are looking for.
"But even a very small percentage of wildly greedy people can damage a system severely."
You are close to placing the blame in the correct place. My emergency department was just bought by a private equity group. There were 28 doctors. Most of whom worked there because they could spend adequate time with patients and work a reasonable schedule. After the PE company bought us, they mandated less of EVERY position from CNA to MD. The MD headcount is now 11, and the 17 physicians who are looking for jobs are having a tough time (relatively) because most other emergency departments in the area are also owned by PE firms who care about money over health outcomes. Those are the greedy people damaging the system you are looking for.