There are many companies in the temporary staffing arena, said Cramer. There are those that provide general labor services while others provide specialized workers like those in accounting, information technology and engineering. Cramer said the latter is the better play as those employees afford the staffing companies higher margins. That's where Robert Half comes in, said Cramer. This company enjoys 40% margins and is a leader when it comes to placing accounting and IT professionals. He said the stock trades at 19 times earnings and the company has a 20% growth rate, which is better than its competitors like On Assignment ( ASGN). Cramer said that shares of Robert Half have already run up big, but the move has only just begun as more and more companies begin to navigate the new health-care requirements in our country.