It does matter. It does matter. If 5 people have 1,000,000,000 then only 5 people will have homes and the rest will live in shacks made from discarded wooden pallets. There would be only so many cars to sell that those 5 people could buy. If 40000 people have 25000, then they'll buy houses and cars and more. Wealth is jobs. The only way most of us have access to wealth is from working for money. That's what gets us a little wealth and then we contribute to the economy. It's all about jobs.
Or put another way, the main productive facilities that most of us have, are our marketable skills, knowledge, and intelligence. For optimum wealth generation, the various factors need to be in balance: a machine without raw materials is just scrap metal, land without anybody needing it is just wilderness
It looks that trickle UP approach is much better than trickle DOWN one. Even for the rich it is much better to be wealthy among prosperous middle class, than to be isolated and fearful maharajas living in the see of poverty.