Less Voting = More Justice?

Radley Balko thinks we shouldn't vote on DAs:

We'd probably be better off if the position of district attorney were a civil service job and not an elected position ...Voters are too easily manipulated by crime fearmongering and tend to reward, not punish, overly aggressive prosecutors, as well as punish judges who show the slightest hint of balance, mercy, or a better-than-narrow view of due process. ... [M]aking DAs civil servants would least insulate them from the need to justify their job to voters by racking up convictions, which in turn might eventually attract more people to the position whose concept of justice is a bit more nuanced than filling up the prisons with bad guys.