I tried the Jehovah's Witness church once. I did bible study with one of the seniors, which was nice and helpful. However, his wife said to me once, when I said why do I have to wear a suit to church rather than just my nice jeans and a shirt, 'well Jesus wore the finest linens, and it shows respect for God' (not sure which part of scripture that was).
When I told her, these jeans cost £150, she didn't know what to say. Not all jeans are £5. lol
I think when people go to church and have to wear suits, like the Mormons (also went to their church), it invokes pride. A lot of these people are trying to be the best looking for God, like God really judges people by what they wear? If people trust based on attire, this leaves an open room for wolves in sheep's clothing. This was much more strict with the Mormons though, and it made me think, if I brought a beggar with me to church dressed in rags, would they look down on him or accept him as a human being like we all are?
None of us are more elite than others, in God's eyes.