My rig stretches and shrinks I'll cut to the chase. 

Problem:
I'm trying to make a stylized foot consisting of only bones and rigged it (so I can pose it later).
Now when I rotate my a_bones (in pose mode) my bones go slower than my a_bones and then proceed to shrink.

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a_bones = armature bones

bones = mesh object

I will upload the file to this question using blendexchange:
Your Master bone influences your whole mesh, so it conflicts with the influence of all the other bones. You can either:


Select the whole mesh and in the Properties panel > Object Data > Vertex Groups, unlock the Master group and click on the Remove button.





Or select the Master bone, go in the Properties panel > Bone > disable the Deform option.