Let's look at the theology here:
There are some who think that everyone in the parish or everyone who performs a ministry in the parish should wash feet during this ceremony, but that is inappropriate. It is the role of the priest. To have everyone wash feet is to deny the special role that the priest holds and in the end accomplishes the opposite of what the ceremony is meant to symbolize because the priest fails to humble himself. Every priest stands in the person of Christ at Mass. God comes upon and uses the priest in a way that He uses no other human being. In washing feet, the priest acknowledges that he is called to model himself after Christ in a special way.
Hand-washing in the Jewish culture was a purification rite. That is why the priest washes his hands before offering the bread and wine at Mass. As he washes his hands he says, "Lord, wash me of my iniquities and cleanse me of my sins". It is a reminder of his own unworthiness to offer this sacrifice and a prayer asking for forgiveness for his own sins. There is, however, another prominent handwashing scene in the Holy Week story. Pontius Pilate washed his hands when he handed Jesus over to be crucified. In this case, Pilate was doing the opposite of what Jesus modeled. Pilate washed his hands to symbolize that even though he was in charge, he didn't want to be blamed for anything bad that would happen. He was afraid that a riot would break out during the busiest week in Jerusalem and he would be in trouble with Caesar. Pilate was looking out for his own interests, and he didn't care if an innocent man had to die. He was covering himself.
So, who do you think should be emulated? Jesus or Pontius Pilate?