Different jobs have different levels of net benefit to society.
For example, paying someone to "dig a ditch and fill it in" gives that person work, but is a zero-sum game - transferring wealth between people, but not increasing the total pie (total well-being), at least without considering the psychological benefits of work (and exercise!).
Similarly, breaking windows to create jobs for window repairmen creates jobs, but is negative-sum - it benefits window repairmen, but reduces the overall pie. You're better off just giving money directly to window repairmen.
In contrast, some jobs increase the total wealth, and can benefit both the worker and the people willing to pay for the work to be done. (positive sum).
Some positive sum jobs increase the total wealth more or less than others, for the amount of money invested (spend $, increase total wealth .01% or 1%?). Similarly, the net gain of the work may be distributed differently (does the purchaser receive more of the surplus or the provider?)
Focussing purely on jobs ignores the cost - is society better off if I employ 100 people to do the work that 1 person could do?
The best way we've found to increase total well-being is to allow people to pay for what they want, rather than having government mandate jobs to be done.