Nothing that will be able to pay back the quarter-million dollar debt you've incurred during medical school.
You CAN teach medicine to others with your MD, but you will not be able to do this to avoid residency.
BTW, 16 hour, not 12 hour shift, are the standard today.
Other career ideas that will ensure you a job and pay a good salary:
-computer science / coding
EDIT: if people with undergrad degrees in biochem, then why am I beating off recruiters with $100k job offers every week? The failure that kids don't realize is that there are more jobs out there than you ever imagined-don't limit your thinking to what is familiar. Pharmaceutical companies and research companies routinely pays salaries of above $100k / year for people with 5+ years experience. No PhD necessary. PhDs spend their time in the lab- I prefer to be out in the corporate world getting new products on the market.
EDIT: I live in the USA. I got a Master's degree for personal satisfaction in healthcare ethics, but it doesn't pertain to my job. I work in management for a large clinical trial company- in NO WAY does my position have anything in common with a biochemist. http://www.glassdoor.com/Salary/Genentech-Clinical-Trial-Manager-Salaries-E274_D_KO10,32.htm
Most of my coworkers have a bachelor's degree (usually in biochem, biology, chem) or are RNs (nurses) a few have gotten MBAs or PPMP certification. Keep in mind that when I got out of college, I started at $44k and worked my way up over several years.
Your assumption that more degrees means more money is largely false. The PhDs who work in the university setting rely on grants and make half of what the people working for big pharma with just a bachelor's earn. Also, the assumption that people who get a degree in biochemistry all end up getting jobs as biochemists is also false. There isn't a degree that directly relates to every job out there. There isn't a degree in "Clinical Project Management", "Quality Assurance Auditing", "Pharmacovigilence Safety Specialist", "Medical Science Liaison", "Pharmaceutical Sales"- but all these jobs are filled by people with biochem degrees and they get paid around 70-150k. It's a small pitiful world if you think that people who get biochem degrees all end up being biochemists.