Prayers? Why?

My questions concerning prayer are centered on knowing why we do things. When it comes to religion we appear to have our minds set. Have you ever wondered why Paul as well as others did not end their prayers with an "in Jesus' name?" Have you ever wondered why we have no record of Paul or others praying for the sick? Or how about the example we use for our weekly contribution was a collection to be taken to Jerusalem specifically to help the poor while we use it for whatever we like spending it primarily on ourselves and say we are commanded to do so? Our preachers concentrate on talking to the saved but call themselves evangelists. We do not have time to read the scriptures in our assemblies.