Lyric discussion by tigerareyouthere 

Cover art for Explode lyrics by Cardigans, The

I too think it's about someone close to her with an addiction and she's offering help.

"Ease your trouble We'll pay them double"

You have to take responsibility for your feelings and thoughts and learn how to deal with them. Otherwise they'll return to you twice as hard, cause now there's the addiction too. So "we'll pay them double".