I dont really think that wealth can solve all of our problems. It may make things easier for us at the short term, which is why we need wealth anyway because everything in samsara is based on wealth and needs wealth to actually move, you cant build a house with your bare hands anymore, you have to purchase the actual house itself these days unless you choose not to stay in a place with people. But money bringing happiness? Not really. It just makes things convenient to acquire. Happiness is a state of mind. Money can only bring satisfaction that is temporary, but ultimately, the mind must depend on itself to be truly happy.