The Pope needs to remove them from the church.
Strictly speaking, the Pope can't remove them from the Church. Baptism makes "an indelible mark upon the soul." They will always be Catholics.
BUT . . . to your point. He can silence the worst individuals from making any public statements. He can disband their entire orders. Or he can wait for the trouble-makers to die, which is ongoing at very great speed, since they are all old. He appears to be doing a bit of all three. I'd like it all to move a lot faster, but no one made me Pope. Or even God.