Mass. voters could decide the largest slate of ballot questions in decades. And it’s going to get expensive.

 Mass. voters could decide the largest slate of ballot questions in decades. And it’s going to get expensive.

Unions, advocates, and out-of-state groups are pushing to put five ballot questions before Massachusetts voters this fall, creating what would be the largest single slate in 24 years.

The number and diversity of the proposals underscore how advocacy and special interest groups are regularly willing to not only turn to the ballot box and bypassthe Legislature to realize their polic…