The Gospel of Prosperity

Many national evangelists have been in the news recently and criticized for their sermons on what is called the "Gospel of Prosperity". Much of this has been because of their own lavish lifestyles, but I'll let others deal with that. I have no problem with it-if that is how you wish to live and you have the financial resources to pay for it, go for it. It is a free country.
They do seem to leave out the part about personal responsibility.
I think the gospel SHOULD be one of peace and prosperity. I am convinced that if I get up every morning and attempt to live my life according to Gods' will, use the talents He has given me and do what is in the best interest of society in general, I will live a much better life than I other-wise would live. This means working to meet the needs of my family and also being involved in my community and generally being a asset to society in general. It means being an example to others and living my life in a way that honors God It means doing the right thing.
This does not necessarily mean that I will not have challenges or even hard times along the way. Sometimes life throws us challenges-illness, disasters natural or caused by things beyond our control. It does not necessarily mean that wi will all become financially rich and live in mansions.
We will, however, be better able to provide all the things our family needs and for our own future needs in a way that brings us peace and personal satisfaction.
Isn't this scenario the Kingdom of God on earth?