How to repeat an action against all clips in a sequence in Premiere Pro CC
Adobe has included a scripting framework in most of its apps, (you may have noticed a tool called extendscript toolbox, that's the IDE for it). Unfortunately they neglected to document Premiere's scripting API, so you have to work it out yourself / using the internet. 

So yes, you could indeed develop a script to do this within Premiere. After all, why spend hours doing something by hand when in only a few weeks you can develop a script to do it automatically?