As the result, the half of the villagers, namely, 25 people have lost their jobs. That means, they have lost the completion to secure their jobs and has become unemployed.
a picture of losing a job and bankruptcy
The remaining 25 people who won the competition maintain the production by the same 20 working hours per day (25 people * 20 hours = 500 hours). On the other hand, unemployed people also need food, clothing and shelter. When minimum necessities were not guaranteed to these people, they would be in danger of starvation, and in addition, they could turn into riotous crowd.

N.B. If you replace "unemployment people" to "poor countries", then the word of "mob" could be replaced to the word like "piracy, terrorism, war".

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