E-book Prices Give Me a Headache

There is really no reason an e-book should cost more than a paperback. I mean, think about it. There is no cost for paper, ink, printing, etc. The publishers set the cost and I understand them not wanting to lose money, but come on! What "reason" do they have for making something that costs them practically nothing to create vs the printing of a paperback? I come with examples....

All of the books above cost more than their paperback version, while the example below is at least the same.

I am more likely to buy something that is the same or (preferably) lower cost as the paperback. Am I the only one practically outraged by this? I think everyone who has the same issue needs to write to the publishers and demand lower prices. I didn't pay $150 for an e-reader to spend more money on books after all.