[bumby]

That’s kinda the point. Sugar is also "substantially" more expensive than "free" pornography. With your analogy of sugar, there isn’t the same asymmetry of risk/reward as there is with “free” pornography.

The reward of lotto tickets is a function of cost with the current approach, but that’s the wrong point to get wrapped around the axle. Consider instead that if the lotto reward is funded by taxes. The point is the risk/reward profile gets skewed.

As an aside, I’m pretty sure you can find evidence that excessive gambling is a net negative.