If you have a large sales team for products that are not selling, and you want to invest in building a brand new product, you are not going to be able to move the sales folks into R&D. If you end up building the new product, you may eventually need the sales team, but most businesses in the meantime would reduce the headcount in sales instead of retaining them. I’m not saying that not bad for employees, but shifting focus isn’t always about changing what employees work on.