Wisconsin goes big to lure a factory. Critics say it doesn’t make sense.

If all goes to plan, a giant Taiwanese-owned electronics factory will break ground next year in southeastern Wisconsin. The $10 billion plant is supersized: at 20 million square feet, it would be five times the size of Boeing’s main plant in Everett, Wash., and would employ up to 13,000 workers to make screens for devices used in homes, cars, and hospitals.

Equally supersized is the incentives package that Wisconsin is offering to Foxconn Technology Group to build its first US plant there. With $3 billion in tax breaks, the package is reportedly the most generous ever awarded to a foreign investor. It has stirred controversy in Wisconsin where lawmakers voted last week along largely partisan lines to approve it.

Foxconn, which

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