Answer:
Take off my skin, I won't cry, but you will.
A nut cracker up in a tree.
Die without me, never thank me. Walk right through me, never feel me. Always watching, never speaking. Always lurking, never seen.
What gets beaten, and whipped, but never cries?
Gets rid of bad ones, short and tall. Tightens when used, one size fits all.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.