The Voice of the People is BY DEFINITION codified by the actions of the legislature. We have a REPRESENTATIVE government, not a "democracy." We elect and pay our legislators to act intelligently on our behalf.
The Founders knew that the general population, acting collectively, is stupid, which is why NO SIGNIFICANT policy decisions are decided by popular vote, under the U.S. Constitution.
Democrats like the idea of substituting ballot initiatives for the actions of the legislatures because they like to take advantage of the stupidity of the masses.