Qlikview is not designed as a capture tool. It's strength is in reporting and analysing data
You could probably achieve the effect that you are after with a Qlikview extension. Extensions, well extend (!), the functionality of the core product.
The below extension (developed by Stefan Walther) would enable you to display a webpage. You could use a Google Form or a service like Survey Monkey or a page internal to your organisation to capture the employee ideas & suggestions.
I hope this helps!
The email thing works. But I like to use a product called bugherd (The simplest bug tracker and client feedback tool | BugHerd) that adds a feedback button into the document. 'm sure there are other similar products as well.
In the QlikView APIguide is a macro :
rem the variable MyVariable must exist for macro to work!
oldtext = ActiveDocument.Evaluate("MyVariable")
t = ActiveDocument.GetApplication.InputBoxEx("Enter text:",oldtext)
In combination with the variable My Variable and a button a textbox opens and you can add comments. Theses are stored in the variable. Not a great solution but it might fit your requirement,