The problem is you M operators want your cake and eat it.
Actually, they just want the fuel suppliers and government departments to abide by the law............
"Commercial" in the aviation context has more than one meaning and its use seems pretty inflammatory in certain circles.
"Commercial Air Transport" has a very specific meaning in the EU and many countries have restricted the tax exemption/rebates to such operations.
"Commercial" Ops in other places can (and do) mean corporate or "aerial work" as well.
In fact EU Directive 2003/96/EC specifies that only aviation fuel used for private pleasure-flying should be taxed. So any aerial work, training or corporate/business use qualifies for the tax free supply of aviation fuel. If the suppliers and governments involved don't want to play by the rules then you can hardly blame the operators for doing the same.