How do I transfer purchases to my new account?

Question

I received my first iPod sometime in 7th grade and purchased many songs for it then. However, since I was a minor I had to use my parent's account to purchase those songs. Those purchases were using my own iTunes giftcards. Now that I am over 18, I created my own Apple ID, but the songs that I purchased with my parent's account still require authorization. Unfortunately, my parents will change the password now and then without warning which prevents me from listening to the music I purchased under their account until I can get the new password from them. I would like to transfer ownership/authorization for the music I purchased using my parent's account to my own personal account. Is this possible in any way?
I know about the normal policy. Purchases cannot be transferred to another account. However, I know that exceptions can always be made and I feel that my case warrants one. The purchases made on my parent's account was using my own funds. Thus, they belong to me. I am not stealing somebody else's music since the only songs I wish to transfer are the ones I purchased with my own money. Is it possible to contact an Apple Support manager and get this issue resolved?
If not, Apple should consider allowing minors to create accounts under the jurisdiction of their parent's account until the minors turn 18. That way, minors will still be able to purchase iTunes content and retain it when they become legal adults. If Apple will not fix the current issue, then they need to at least ensure that future users will not have a similar issue.

Answer 1

I also have one more thing to add. My parents now have iPods, iPhones, and Mac computers of their own. Thus, they have maxed out the five authorized computer limit which means I cannot authorize my computer for the purchases I made on their account.