Why is Teleknesis so hard to prove under a controlled laboratory ?

It is simply not possible to move obstacles with the power of the mind. Think about it. There are 6bn people in this world. If telekinesis was possible, then surely somebody would come forward by now and demonstrate their ability in front of an audience and under scientific conditions. If such a person did exist they would be a multi millionaire by now. After all telekinesis is one of the easiest to prove in a laboratory. All you need is a camera and enough space between the subject and the object so you know there is no trickery involved. (remember uri gellar)