If the business fails, the owners will have to use their assets to adequately compensate the employees according to what they are owed, and the employees are free to find another job.
Let's not mince words here - if the business fails it was because of the incompetence of those managing it, and it would fail whether or not it was treating employees unfairly. I won't accept this as an excuse to erode labor rights.
Moreover, what weak-ass crybaby rhetoric is that now? I always hear that business owners should earn more because they take risks. Failing is a very real possibility when you take risks. If you don't want to take risks just don't start a business.