When new jobs are added, there is no intention for them to earn more gralats than the other ways. Why? That would just force everyone to do that single method for the best payout. The idea is when a job is added, to balance it with the payouts of the already existing jobs.

Basically, players should have choice in how they want to earn gralats. If you're looking for a faster/easier way to earn gralats, that's not going to happen.