[Future Snake Eater]

It will not result in large scale reductions in the price we pay for goods on a daily basis.

It doesn't necessarily have to. If your income is higher or, similarly, you have more money in your pockets due to paying lower taxes, you can afford more. The prices may be static (though I doubt that would happen over the long term, anything is possible), the amount of expendable income has increased anyway.

[SoJoCo]

If your income is higher or, similarly, you have more money in your pockets due to paying lower taxes, you can afford more.

And if your income remains the same and your taxes go up, as they will for the majority of taxpayers, then you can afford less. So where does that make Cain's plan a good thing?