I wouldn't argue that tax breaks should be "illegal", but rather be proportional to the marginal utility that the company brings to the city (job market, invest

I wouldn't argue that tax breaks should be "illegal", but rather be proportional to the marginal utility that the company brings to the city (job market, investment, spending, etc) and inversely proportional to the marginal cost that the company brings to the city (infrastructure spending, housing, over-burdening of existing city resources).