Price is the best signal in a free market. It is how supply and demand can be assessed by market participants. 

If corporations keep prices higher than they need to be, there is a business opportunity for others to offer the same products at lower prices, capture market share and still make a profit.

Interfering with that might seem to fix things but will inadvertently lead to far worse consequences over the long term.

The solution is to remove the restrictions that might exist for smaller players to set up businesses of their own, not to coerce those that already exist.