Politicians aren't elected for life but many have made a career out of it. The only way to defeat an incumbent career politician is to catch him in bed with a dead girl or a live boy.<quoted text>
Actually, it does. We, the people, elect representatives. If those representatives stay in office, it is by the will of "we the people". If and when "we the people" aren't satisfied with our representatives, well, they aren't elected for life.
Other than that, all a career politician has to do is talk about helping the little guy as he votes for the corporation and he/she is set for life.