High Priest not enter the Holy of Holies clad in the golden garments Why?

 Vayikra Rabbah (21:10) For what reason did the High Priest not enter the Holy of Holies clad in the golden garments? Because the accuser cannot act as defender. It was in order that no opportunity might be given to Satan of bringing accusations and saying: ' The other day they made for themselves a god of gold and to-day they seek to officiate in garments of gold! R. Joshua of Siknin in the name of R. Levi says: It was in order to save Israel expenses.