Final answer:
Decreased services for people in cities relying on property taxes.
Step-by-step explanation:
A negative economic consequence of the large amount of people moving out of cities is decreased services for the people left behind that rely on property taxes for those services. When a significant number of people leave a city, the tax base decreases, resulting in reduced funding for public services such as schools, healthcare, and infrastructure. This can lead to a decline in the quality of life for those who remain in the city.
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