Many of the part time jobs have been adjusted, especially for teens. Is there a career you think should be very different? Glad you like the mod. :)
For adult Sims, this was intentional; teens have half the pay. With the hours that the Manual Labor career works, $70/hour comes out to just $700/week, which is on par or below most other careers around the same level. Combined with their inability to advance their career any further, this seemed like fair compensation.