I have employed over 100 people 14-26 years old in my retail business in Michigan.
If you think it is unfair to be paid less than some one who is older and has more experience than you, then you will likely be unemployed.
When the minimum wage increased from $5.35 to $7.40 over the past few years, I have completely stopped hiring high school kids and reduced hiring of college kids. They do not have the same level of responsibility nor the experience to anticipate and deliver against what an employer needs from them. If I have to train AND pay them the same, I overwhelmingly will just hire mature workers who already know they have to deliver value to me and our customers.