How to create a motivational system for programmers?

Question

Work organization

Now the question arose of how to organize the work of our current 2-3 programmers. More precisely, not even a job, but a system of motivation. Everything that we didn't try didn't work for more than 1 week, after this period, the enthusiasm of the developers rolled back
QUESTION
1. How to create a motivational system for programmers?
2. Where to read about motivational schemes, specifically developers?
Thanks

Answer 1

There is such a feature that people are initially motivated, that is, if you have an arbota process and all internal processes, you look at the time sheet and get 160 man hours per month as a result, then you want to get more hours?
Hire more programmers, and if you don’t get 160 from one now, then set up development processes, the person who doesn’t work just gets fired.

Answer 2

And you, when they write a line of code, encourage them with a sack) Trained programmers will turn out)