What do you do when somebody goes on vacations or gets a broken leg? Stop the business :)? Here people have 26 days of paid leave + 1 year of combined paternit

What do you do when somebody goes on vacations or gets a broken leg? Stop the business :)? Here people have 26 days of paid leave + 1 year of combined paternity+maternity leave per kid + paid health leave whenever a doctor decides it's needed. Businesses work just fine - they simply hire more people to offset the fact that everybody is expected to be out of office X% of the time. Also there are temporary contracts and B2B contracts if needed (less protection but also less taxes so they are quite popular with IT people).