Private work orders are not affected. Only public work orders.
Public work orders range in tipping price as it is now. Most of them being sub 1k, which is good because all people are doing is hitting a button on their screen and is great for the vast majority of players.
This new system should have driven prices down across the board for making things, instead its caused price hikes because of people refusing to do private orders without someone tipping them thousands of gold.