I know you're asking rhetorically, but... yes.

The federal government has the CBO (https://www.cbo.gov/about/overview) and the OMB (https://www.whitehouse.gov/omb/, warning: Trump pop-ups). California has the LAO (https://lao.ca.gov/About). Estimating fiscal impact of various policies is what those organizations do.

Yes, ROI estimates are very common in all kinds of government spending.

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