Crime is a function of far more than just income inequality. If you perform your regressions on this single variable and then attempt to extrapolate those results to make policy, you're going to end up spending a lot of money without solving anything. Worse is that you'll potentially put millions of lives at risk.

If we want to solve problems in society we must be prepared to acknowledge all of their potential causes.

I have spent my entire adult life, some 15 years, in pursuit of objective inquiry and this is a hill that I am willing to die on, or be martyred when it inevitably costs me my job.