I think you may not understand how Web encryption works.

When you enter the password, your browser uses encryption to send the password to Neteller (you can tell by looking at the URL of the login page - if it starts with https, it's encrypted).

After your password reaches the Neteller servers, it is decrypted. That's why the Neteller personnel can see it.

Even if Neteller were to take an extra security step and store your password on its servers in encrypted form, staff whose job it is to work with passwords would be able to decrypt and view passwords at will.

HTH.