No. A power of attorney does not carry with it an automatic right to compensation in any form.
Your parents own the property. What they do with it is up to them. Your power of attorney doesn't stop them from doing what they wish, or what they are convinced to do by someone else.
Anyone can act as a power of attorney for someone else. You do not have to be an attorney
When someone dies and leaves a will, it does not always state who has power of attorney. To gain power of attorney, one would need to complete a form, naming the person they wish to pass power of attorney to.
No they will not be able to access funds. A power of attorney expires on the death of the grantor.
No. An attorney-in-fact or agent under a Power of Attorney cannot assign their power to someone else.
Yes, you can appoint anybody to hold your power of attorney.
A financial power of attorney gives someone the authority to conduct business for you.
No.
A will can't make you a power of attorney. There is no point in making someone a power of attorney if you don't tell them about it. And a power of attorney expires on the death of the grantor.
Once you have completed the Power of Attorney, you should give the original to whomever you named as the power of attorney (attorney-in-fact) and keep a copy for yourself.
You can get that type of power of attorney directly from the taxing authority.
Giving someone "power of attorney".