I disagree with this. A family member was a taxi driver for a long time and the best money is made on the shorter runs, plus you dont waste time driving back from the drop off of a long run with an empty taxi.
There is already money on the meter as soon as someone sits into the taxi. Dropping them a mile up the road means you actually maximise the money you earn in a given time period, are not going too far out of the busy areas, plus you have a much better chance of picking someone up on the road and/or your base controller will be supplying work within your cachement area.
A long job means that you go out of your cachement area completely, may have to drive for miles empty with all jobs from base on the other side of the city, and have spent a long time driving for just the meter ticking over the miles.