To be fair that’s a risk created by the financial institutions in the way they chose to implement & process the loans, not a risk inherent in the structure of the Paycheck Protection Program. A bank that processed these loan applications fairly and in the order they were received doesn’t really need to worry. (Whether such a bank exists at all is a different story.)
But even the banks who blatantly processed the applications in an unfair or discriminatory manner probably aren’t losing much sleep. The clients with the resources & connections to make a stink are the clients who got approved. Funny how that works.