Better yet: start getting your coffee from a local shop and stop going to Starbucks at all! The trick is finding a local shop with real specialty drinks, not just a variety of syrup flavors.
Or just at least mid coffee. I live in a coffee producing country, and I've tried everything from really expensive coffee to bottom of the barrel, both local and from abroad. The only cup of coffee I sipped and spat out was a Starbucks in Houston.
It's also done to increase the shelf life of the beans. So if you get Starbucks coffee, there's a good chance you're drinking coffee from beans roasted years ago. As someone who exclusively drinks specially coffee, the thought of drinking coffee from beans that were roasted even 3 months ago grosses me out