In a state where the game commission estimates 40% of the hunters do not report their kills it is anything but a science as to why they do what they do.
It's a fallacy that game commissions need a high reporting rate to get accurate estimates of the total kill. If you know what the rate of reporting is, you can quite easily calculate the actual kill from the reported kill. The report rate can be determined statistically in a pretty striaght forward way. Sample the meat processing locations, check stations etc.and collect license numbers of what are obviously known kills. Then link those numbers with those that actually filed kill reports. Now you know what percentage of hunters are actually reporting. With proper sampling, high confidence levels can be achieved with relatively low error tolerance even with very low reporting rates. It's actually quite scientific.