Draining Medicare?

I'm not sure who may be abusing Medicare.  Is it various companies TV ads who comes up with  gadgets/gismos that promise Seniors they will get/feel better if they use their products?  Is it the Dr. who writes a prescription for their Senior patient?  Or finally, is it the patients who convince their Dr. they really could use these products.  Somewhere, somehow, I strongly feel that once again, Medicare is being scammed, at the expense of our government agency and all seniors..............marge