Ah, in children.....
But this is lying on a completely different kind of scale which can carry very serious consequences.  
People in power (your reference to bishops, Bush, Cheney and Clinton) often lie to preserve their power.  Protection against exposure usually serves to preserve power.   Wealth brings power.  Hence.....
That is not to say that all wealthy people are liars, any more than that all poor people are honest, nor that all of those in power lie and that those with little power are all honest.  
I believe that Trump has been so insulated all of his life from negative consequences for his lies that he possibly believes that anything that he says ought to be accepted at face value.  I believe that this insulation from the consequences came about because of extreme wealth.  Many who have much more knowledge than I have written on these boards about Trump's personality defects which cause him to lie.  I don't argue with any of that.  I just think that his money is a factor.