Couple thoughts  

1. Try to get a whole department, much less a whole company to agree on any 1 major change in the company that works for the bottom line.

2. If you ask the employees for their opinion on 1 issue they're going to expect to be heard on every issue.

3. You ask for ideas, get many, and go with 1 of them. A minority of the people are happy and the majority are wondering why you ask for ideas then don't use them.

4. Opens the door to the idea that management doesn't know it all much better than you, obviously can't let that get out.

Just spitballing, obviously no one here is in charge of running a company.