Would this not incentivise the forming of groups that replicate each others work. If you're already committing wilful fraud on your own papers, why wouldn't you

Would this not incentivise the forming of groups that replicate each others work. If you're already committing wilful fraud on your own papers, why wouldn't you commit a bit more for another researcher willing to do the same for you? With >2 parties, it won't be immediately obvious that this trading has occured.