I'd say prices of products come down due to competition, not due to the companies getting more money outside of the regular supply/demand relationship.

Let's assume you have a monopoly on something with a guarantee that no one else can sell the same product in your market. Then there is no direct incentive to make the product cheaper, even if you can produce it for cheaper. Adding more money on top of it that is supposed to trickle down in some way will not make that product cheaper, unless there is an incentive for that company to do so.

The real world is of course more complicated, let's say you have two companies that get the incentives and one of them is using it to make the product cheaper, then that will "trickle down" as a price decrease because the other company need to follow suit to stay competitive. But this again is driven by the market and not the incentives and would have happened without them just as well.