I would agree that when a lay person (e.g. an Elder) provides Pastoral care to any member of the church, the same ministerial ethics, the same code of conduct, and the same depth of spiritual commitment that apply to Ministers need to also apply to them; simply because they can be ministering to vulnerable people who need to be able to trust them.
Likewise for those who work in a paid capacity within the local church office, and honesty and confidentiality are required, then again similar standards between the Minister and staff must apply.
However, do we require this standard to the church member's non-Christian husband who has volunteered to mow the church lawn or fix the church toilet...... I suspect that we do not!
Likewise, do we expect an unusual amount of christian maturity from a young person who is a gifted musician, and bar him/her from the worship band unless they "attain to the same standard" as the minister? Again, I suspect not! (Although we could cause him/her to go elsewhere if we do. From my experience if are going to be so ungracious let us show our true colours early so that he/she can make the transition earlier than later and not waste too much time with us..... it will be the greatest service that we can do for them!

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Recently we held a "Cafe Church" outreach service to which members were encouraged to invite their non churched neighbours. Among the various artist was a young lady, a new Christian, who among other things earned a living as a singer in night clubs and a part time bar maid. (Perhaps more outragiously for some, she had a "stud in her lower lip) But the songs that she sang she also wrote from her new found spiritual experience and many of the deeply spiritual people in the church, understood her journey and were truly blessed. In fact, one lady was in tears.
When I think that Jesus chose 12 ordinary blokes with all of their flaws and deficiencies to follow him and how after repeated failures they eventually got it right....... then I don't think that we should put too high a standard before others who in many ways are like them, and who like them, will grow and mature and eventually get it "right" if only we could be patient and gracious with them.
Goodness, there are times in my ministry that I don't think that I get it fully right, and I don't always measure up to the full stature of Christ. But God persists with me and he who sanctifies me wholly also santifies me day by day through failed experiences.
I think that the highest standard we should strive for is the same gracious love of Christ for others that he in his mercy shows to us day by day.