[quote=all]Paying taxes on any interest seems kind of unfair to me.[/quote]
You’re not paying taxes on interest. You’re paying taxes on whatever income you have, and interest is one expense that can be deducted.
Personally, I have a much bigger problem with corporations being able to deduct all of their expenses before paying taxes, while Joe Sixpack isn’t able to do so himself. The standard deduction doesn’t come anywhere close to the cost of very basic living expenses. If corporations can deduct ongoing expenses, middle and working-class individuals should be able to deduct expenses for a basic standard of living.