It causes the inside tire too turn in faster .
On the Dino I had , the outside tire did some funny thing at full lock .
It would actually turn out too the right slightly when turned full left and vice versa when turned full right .
the quickest answer to your question is it can really help the kart to point into the turns.
The inside front tire turning at a faster rate over the outside front can help to unload the inside rear quicker/more. The outside front still does most of the turning but the increase of the ackerman effect, toe out in turns, with the caster and camber can really help dial in the inside rear unloading. Think of it as an aid to changing the timing of the events of making a corner.