Sure KingJ,
I would say it stems from the fact that God is not interested in need. He already promised to supply ALL our need in Phil 4:19, so all we do is take Him at His Word, after all He did say in Psalm 89:34 that My covenant will I not break, nor will I alter the thing that is gone out of My lips. So whatever He says He means exactly that, or else He would have said something different.
So in Psalm 23 it doesn't say The Lord is my Shepherd I shall not NEED, it says WANT. We aren't to be focused on our needs (1 Peter 5:5-7 He says to cast the whole of our care on Him or else we're being prideful), but rather He wants us focus on our wants.
Mark 11:24 Jesus said WHAT THINGS SO EVER YOU DESIRE, not what things God desires, or what things you need, but rather, what things you DESIRE.
Psalm 37:4 the Father says to us to delight ourselves in Him and He will give us the DESIRES of our hearts, not the needs.
If He is not interested in our wants then why does He want to give them to us? If our children ask us for candy at the store do we snap and say, "You greedy little worm! You don't NEED candy!" No, we'd say, okay, let me get you some - which kind do you WANT?
Why does Jesus speak of the Father giving GOOD gifts to us after giving the analogy of parents giving their children something they don't want (like a snake in place of bread)? Because God is very interested in giving us our WANTS.
With all this mind now, seeing through the Scripture lens, WHY would God multiply bread for someone here in the USA? Because they had a WANT and Jesus did not say, "IF you are POOR, THEN, and only then, will you do all the same works I have done and even greater."
You are blessed to be what? A blessing. As opposed to being blessed to meet a need. God uses the word blessing and the Blessing of the Lord makes RICH, and He adds no sorrow (Hebrew for toil) with it. Blessing literally empowered to prosper, as opposed to empowered to have needs met. Prosperity goes well beyond needs.
If you go down the needs road, everyone must continually have less than whoever they see, because there will always be someone somewhere that has less and yet is still alive. He won't have a wife, won't have clothes, will eat bugs for food, get sick, stink, won't have a house, won't have utensils, etc, etc. And everyone would have to come down to that poverty level in order to comply with only getting from God if you're poor, or even po'.
Yet, all you can see from God is that you are supposed to be wealthy, rich, prosperous - BLESSED, all the time, everywhere and in every way, spiritually, physically, financially and socially.
I have seen God do very specific things with the stock market for me for rich men - WHY? Because I wanted it. I have seen God heal me from awful things - could I have stayed alive without sight or without a knee or without a hand? Of course - but I didn't want those things - and He healed me, because I wanted to be healed, not because I needed to be healed.
SO back to the bread multiplying - He will do ALL that you expect Him to, all that you can and are willing to believe Him for, and He cannot do anything you won't believe Him for. It's like your body - you expect it to do 50 pushups straight and you work at it, the body will come UP to that level for you. If you don't practice it, your body will NOT. It is no different with our faith (which is HIS faith, 1 John 5, 2 Peter 1:2, Mark 11:22 (the Greek says "Have the faith of God", as in, He's offering to you), Galatians 2:20 (By the faith OF the Son of God, not IN)).
How many times did Jesus say "Be it unto you, even as YOU believe."? What did He say to the woman with the daughter who had a demon? Woman, FOR THIS SAYING it is so. She wanted it and wasn't leaving until she got it.
When Jesus was in the wilderness with the people who followed Him out there, and His disciples said send them to town so they can get something to eat, what did He say? That isn't necessary - YOU feed them! He multiplied the bread and fish and the Scripture says that all ate and ate UNTIL THEY WERE SATISFIED, not UNTIL THEY HAD AS MUCH AS THEY NEEDED.
When Elijah multiplied the oil, he went WAAAAAAY beyond that widow's need and funded her retirement. It didn't stop flowing until she ran out of vessels - the oil flowed UP to the level of her faith in God.
Lastly, if it were about need with God, there wouldn't be one poor person on the Earth, and yet, it's because faith works on WANT, not need. There also wouldn't be any sickness or disease. Everything would be automatic for every Christian, there would be no faith involved whatsoever. Mark 11:22-24 - Remove what you don't want using the faith He's given you (which is equal for all Believers because it's HIS faith given to you (the Son of God's (Gal 2:20)) and bring to pass what you DO WANT, using His faith.