First, I strongly, strongly disagree about how Biblical the prosperity gospel, buy that’s theology. The person in question was John Stossel, who falsely and, I think, deliberately edited tape to say something exactly the opposite of what the minister said.
If you put your faith in a prosperity gospel you put your faith in a hunk of stinking baloney my pal.
The proper biblical reference point is Paul who knew either “how to abound” or “how to be in want” both equally for the sake of the Lord. Riches or poverty, neither are a sign in themselves of spiritual curses or blessing. Both if offered to the Lord can be blessed, and as long as the poor person does not steal he is actually in a more advantageous spot. God already has the wealth of the world; he doesn’t need a Christian’s check for a million dollars.