Tesla's internal pay database shows that it offers lower salaries than peers but substantial stock grants.Tesla's top earners must bet on the company's high-risk and high-reward system.Tesla's selective hiring process includes Elon Musk's sign-off for every hire, which involves finding only the most "hardcore" workers.Tesla lags behind its peers when it comes to median base pay, based on data gathered from SEC filings.Tesla's stock grants make it easier for employees to accept lower base salaries.Stock grants at Tesla are typically in the form of restricted stock units, that vest over time.Nearly every category of Tesla employee has received some type of stock grant.Tesla's stock strategy has proved better than cash in an employee's pocket, said Greg Selker, a managing director at recruitment firm Stanton Chase.Tesla's top executives have received stock offerings worth up to $20m each.Tesla's mission-driven element allows it to get away with paying less for top talent, said Haely Shaiken, a labour expert.