alt Hacker NewsI think you're over-estimating how much slack there is in the organization.
A rule of thumb is that benefits cost an employer 25-30% of salary. So you're already pushing to 50% of revenue going to direct salary costs. Then there are employees in non-revenue roles (HR, legal, accounting, IT, etc...) and employees doing non-revenue work.
Finally, you have rent, licensing, insurance, and all the other fixed costs.
An awful lot of businesses go under from underestimating what their expenses inevitably will be. Everyone they deal with has their hand out to get paid.