He said the present system should make way for one in which candidates openly declared their candidacy and could motivate why they should be elected.
Those entitled to vote for candidates should have the opportunity to consider them after question-and-answer sessions and open debate.
Sexwale said: "If someone wants to become the treasurer, he must be able to say how he'll manage the money."
With reference to the presidency, Sexwale said candidates should respond to questions such as their views on HIV/Aids, and what they would do if there was corruption in the police.
"Some people say the style is too American, yet they drive American cars."