By itself, no. It's just one of a thousand moving parts that should be optimized. When we talk about one thing (like transparency), I don't think any serious person would consider it a silver bullet that solves the whole mess. We're talking about one thing in isolation. We still have to talk about the other 999 moving parts, too.

Sure, but even the other 999 moving parts won't provide universal access.

Markets don't provide universal access. They can't. It's not what they do. Markets are excellent at price discovery and resource allocation and giving people the opportunity to shift resources from what they currently have to what might bring them more happiness/satisfaction/needs met/utility. But markets cannot provide universal access to goods or services, because for anything other than the very cheapest of goods there will be plenty of people who can't afford to purchase them. There will also be plenty of people who could afford to purchase those goods, but at the price of giving up all other consumption (other than, perhaps, other necessities).

If you want universal access, even the most frictionless and efficient markets can't give it to you.