Better busness or are their customers demanding it? PLoS is a Non-Profit - feel free to look up how much they make. I believe it is public record.

If researchers cannot pay the APC then PLoS often reduces the fee. Also - half of that grant money is used by the Institution as administrative overhead. An part of that overhead is paying Elsevier for journal access. If you want to decrease the cost of research that may be a better place to start.

I agree that volume often tends to result in garbage but the review is supposed to lessen that. Again that garbage did get funded some how.

I am not pushing PLoS - they are simply a publisher I am familiar with that uses this model.