Funny thing about football, all these guys are getting paid fully on their contracts, no matter if they are playing every Sunday or sitting on IR for the rest of the season. Not saying that they don't have motivation to try and make it back, but in most cases, it is not a financial one. A guy like Jaire actually probably stands to lose more than he stands to gain by playing. A worse injury (achilles, ACL, etc.) might negatively effect his new contract.
Now the guys that have incentives (per game roster bonus, yards, etc.), they might be financially motivated to make it back as soon as possible.