I believe it was Arthur C. Clarke who said that anyone who wants to be President shouldn't be allowed to run. That rings true to me. Levitz's 30th century Earth had presidential candidates chosen by computer then voted upon by the public. Thus, the candidates generally weren't seeking the post, were guaranteed to be qualified, and it essentially didn't matter much who the public chose since they were all qualified to begin with. The current system, as Clarke posits, favours candidates good at winning elections aka popularity contests as opposed to any genuine ability to do the job.
Of course, that could be very bad if someone ended up getting control over the computers. "The candidates in this election are... Tharok, Tharok, Tharok, and Validus."