England robbed of goal in Germany match

I just saw the headline saying "Germans Trounce England" this morning.   I didn't watch the match live but streamed most of it,  and my response is Bollocks!  Officials trounce football is more honest.  The Germans deserve the win but it wasn't a trouncing.   And the momentum could have been quite different had England's second goal--clear on the replay-- been allowed in the late first half.   Regardless,  the question of how officiating affects the game keeps bubbling to the surface.   What was FIFA's reason again for not allowing the devices in goal that verify a ball's crossed completely over the line?