Sydney reinvents Vestments

What is requiring clergy to dress smartly in services other than a reinvention of vestments?  After all the chasuble, alb and other vestments originated as posh wear in their day.

An article in the Church Times said that a Bishop in Sydney was complaining about the standards of priestly attire:

He believed that ministers should dress appropriately to the congregation style, “perhaps just a tad slightly higher, appropriate for their leader ship role, neither standing out at the top nor at the bottom”

[I thought of illustrating this with a picture of a scruffy cleric, but apart from self portraits was unable to find one; I was also wary of causing offence J]