1- Re "prayer", think of it as "thought-pressure" that bends this dream we call "reality".
As i've speculated before, Jesus was a "Master of the Art of Dream Manipulation", seemingly able to bend the rigid laws of physics to produce what looked like miracles.
2- If a cause is just and right, christians are glad to support it, for example much cash donated by the public to the Big Charities finds its way into the pockets of the charity bosses, Al-Qaeda and Somali warlords etc, so most christians prefer instead to donate only to smaller trustworthy charities such as local homeless or disabled groups in their own cities, or to people they know all about.
I know christians who never leave the house without extra cash in their pockets to dish out to beggars and the homeless in the street.
But if an unknown golfer in Florida or wherever was to ask for a handout to buy himself or his kids a pony, no christians would be mug enough to donate in case he splashed it out on a new set of clubs..