TRAIN and Pick-up Trucks

Top Gear Philippines posted the new 2018 price list of the Toyota cars line-up, after the effectivity of the TRAIN (Tax Reform for Acceleration and Inclusion) law. Yes, as expected, expensive and/or luxury cars either retained or even decreased their selling prices. But the more interesting observation is how pick-up trucks, i.e., the Hilux lineup, saw decreased prices as well, regardless of the original price.

I still can’t surmise why pick-ups have to benefit from this law? Please, someone, explain it to me.