The problem isn’t the fact that “people have withdrawal pangs” – this is a physiological response to a particular stimuli suddenly going away. Your brain is conditioned to respond to what it expects and when you suddenly change the rules – it is sent into a state of panic. In an act of preserving itself – it tries to horde whatever sustenance it can – which sounds eerily similar to how people act as a whole. Nonetheless, your body only does this because it believes it needs it.