I am not sure whether one needs to do that or whether it is this that helps them become good, if at all. If the practice is so important then sweepers should be realised human beings. As to ego it can conceal itself behind any mask including God’s service, monkhood, sweeping the toilets and all the rest.
Yes some are helped not so much because of what they are doing or the outer practice they are following but because they have a genuine inner aspiration and seeking for Truth and God. These people will progress anywhere regardless of what they do or do not do. The key is aspiration and neither monkhood or toilet cleaning.
Affectionately,
Alok Da