Staples have no place in clothing or retail and they're the bain of my existence. In things like shirts, they often form holes that will appear down the line as the threads wear/tear. In lapels, it will be less of an issue, but as the fabric is often fine, they can be noticeable. What I've done is this:
Use pliers to hold the front of the staple in place. If you brace it at the corner, you'll see less movement and therefore less agitation to the threads (= you won't make the hole bigger).
Take another pair of small pliers and bend the underside of the staples out, into their original form.
If you can bend it out perfectly straight, the staple will pull out with little disturbance.
However, if you're like me and paranoid about making the hole larger or catching the fabric on an errant sharp piece of the staple, just cut the pieces off with the pliers/wire cutters as close to the base or fabric as possible.