How would it be different if a hospital murdered X% of their worst-prognosis patients every January 1st, rather than letting X% die over the course of the year regardless of interventions?
If you like the theme of murder: How would it be different if a prison, rather than executing death row inmates on the first day they were legally permitted, instead delayed their executions so they could bundle them up into annual batches?
Tesla has demanded that firings be carried out at the same rate as average attrition for poor performance, even though those two things have different causes and remedies. People who perform the least-well on their team but are still a (potentially large!) net benefit are generally not fired, but systems like this demand they be.
What's thoroughly disgusting is an employer summarily firing the bottom X% of their workforce, largely because the top management fucked up scheduling and needs to restore investor confidence.
(Also, patients are customers of the hospital -- you should be comparing this to hospitals firing their worst doctors every year, which IMO, would be fantastic.)