Stacking stones

This year I'm adding perforated pipe to the dry stack stone retaining wall construction process (pictured wrapped in white filter fabric). The pipe's purported purpose is to provide a passage for water to flow through the wall, thus alleviating potential hydrostatic pressure that could cause rotation and failure. I'm fairly certain based on the performance of the previous installations that a good amount of crushed stone behind the wall ensures ample drainage, but we had extra pipe and filter material so I decided to give it a shot.