Avoiding church nepotism

In general, unless they turn into Satan-worshipping-hedonistic-prodigals, minister's kids are awesome.

I've loved having minister's kids involved in the churches and ministries I've been a part of.

They are talented.
They are invested.
They are... Always around when you need them.

But, this leaves a lot of churches open to the charge of nepotism.

If the minister's kids are in the band...
Or leading at youth group...
Or heading up the children's ministry...
Or taking over when the minister retires...
A tinge of nepotism can exists. 

The minister, even subconsciously, can favour their offspring.

But, how is ecclesiastical nepotism avoided?

In short, if the minister is the sole decision maker, you won't. 

So, as a rule, a minister should never be the one selecting their child. 
Someone else does.

Or, the minister doesn't select their children's involvement in isolation.

For, as talented, faithful and Spirit-driven a minister's kid might be, human nature will make people's mind wander towards genealogical favouritism.

As a minister, they should want to avoided this.
And, for a minister's kid, the accusation of nepotism should be something they never need to answer or wonder about in their minds.