Under normal circumstances most people would not attempt to commit fraud to get WIC. The value of what is provided is so small that its generally just not worth it. For most people its about 50 bucks a month in supplemental food assistance. Its more generous when you have an infant on formula, but even then its only about 90 bucks a month in formula assistance. However, when you have a family living paycheck to paycheck with a newborn, between diapers, wipes, other baby supplies and formula, it can overwhelm a budget enough that some might be tempted to cheat.
In addition to the small benefit provided, its pretty much of a hassle as well. You have to recertify every two or three months and have any and all children involved present, when you do. My daughter has often qualified for WIC but just hasn't bothered because the amount of help available just wasn't enough to make it worthwhile. Shop at Aldi's instead and your overall food budget reduces enough to more than compensate for not getting WIC.
The moral of my story?: I am pretty sure that there is no rampant WIC fraud going on and that there is no major investigative division of WIC out to stamp out fraud.
Also, WIC is not a "state benefit" in the same manner that food stamps, TANIF and Medicaid are state programs. Its a program funded by federal grants that is administered completely separately from any other welfare benefits.

