Except what you just said isn't true at all, and show a baseless understanding of jungle.....
Best way to win games is to drive by camp kill on the way to a gank..... and Scuttle early game is actually not that good. Early game the BEST way to get ahead is Krugs Krugs Krugs. If you do NOT do Krugs, your first clear will get you level 3, almost level 4. If you do Krugs, you will be almost level 5. It's also better gold early game (Scuttle starts out 70g. Krugs are 150g)
Basically what early game scuttle is, is a way to either gain some HP back on a HP intensive clear, and some mana. It's not actually the best Gold/XP path.
Anywho..... Junglers will just leech lanes...... (the same problem Riot tried to address 6 months ago by reducing jungler gold per kill in lane to -15g penalities.... kind of ironic they want to push junglers back into lanes now.... probably has something to do with the new turrets, and a need to keep the games short)