In what meta are you playing that this still works?
In the S4/S5 metas the enemy just holds all five of you at one inhib and tower and then laughs while a fourth and possibly fifth depending on how far the gold lead is, guy split pushes. Meanwhile, you're so far behind on gold that the enemy team just has to wait until 1-2 people get impatient enough to go counter the split and then dive when they are certain enough dangerous CC has left the pokefest that they can dive and ignore the laser turrets which are weaker than the outer and tier 2 turrets.
I prefer it as the attacker and defender if it was how you described, necessitating that winners push through a single inhibitor and right into the nexus like a wrecking ball, but no MOBA actually encourages that behavior, it's more conservative to draw the game out another 10 minutes and let pressure win for you in case you fuck up and get aced with your 15K gold lead, the pressure will make it that the winning team that just threw the game can't lose because all the lanes are pushed too far in.
[{quoted}](name=Superior Tactics,realm=EUW,application-id=3ErqAdtq,discussion-id=9ihqbA95,comment-id=00200000,timestamp=2015-09-04T18:07:46.322+0000)
I've noticed, once you're behind it mostly helps a lot to defend and ward well around your base to secure as much jungle and river objectives as you possibly can. The enemy is gonna want to enter your base and it's a good opportunity to rake in some counter kills + gold. Crawled back up that way many times.