Steve LeVine

By Friday evening, the heads of the world's 20 biggest economies -- from the US to South Africa, encompassing 85 percent of global economic activity -- will have dined, met, lunched, met again, and made their pronouncements.

If history is any judge, there may not be much in the way of immediate or lasting results.

Despite the rhetoric of the past 18 months, few in the nation's capital really believed the Beltway lobbyist would disappear overnight just because a new President vowed to change business-as-usual in Washington and Congress heightened scrutiny. Yes, lobbyists now must heed stringent new disclosure rules; the gift-giving and golf outings have largely vanished.