Imagine a situation with two people and a state-like actor.
One person has all of the food in the entire world minus one loaf of bread. The other person has one loaf of bread. After they eat that loaf, they will probably die of starvation in the next 30 days.
This is a Pareto efficient distribution.
If the state-like actor intervened and re-distributed some of the food to the other person (with coercion), I would argue that aggregate welfare would be improved.