How direct should our democracy be?

A Star Tribune poll released Sunday indicated that 71 percent of Hennepin County residents think they should get to vote on a proposed 0.15 percent sales tax to fund a new Twins ballpark. The Hennepin County Board votes Tuesday on whether to send the proposal to the Legislature, which could approve it, deny it or put it up for referendum. Which decisions should be made by the people and which ones should be left to their elected representatives?