Yes, the climate wins with high unemployment.

People lose their homes, become homeless, that saves a lot of energy. A home needs to be cooled, warmed, light, tv etc all that regular stuff. If society is lucky, the person will not be able to own a car either. Also doesn't waste energy on cooking, doest shower much.

When a person is homeless, he contributes vastly less pollution.

The homeless may be the people contributing the best effort to limit pollution.

We could probably hit our targets for climate change by increasing the homeless population by several magnitudes.