Greed is what keeps prices low, and competition high.

I'd replace "prices low" with "value per dollar high" or "efficiency high". Most of the replies to your comment complain about cheap products or claim higher prices are better if they come with particular outcomes. To be fair, they have a point.

However, the average commenter here doesn't have to choose between buying new work clothes and eating meat this month, so you have a point as well. So I'd generalize the sentiment to value per dollar or something similar.