It's very difficult to argue in good faith "trickle-down" economics was/is a failure.

A rising tide obviously raises all ships, including the nation's poorest.

To create vast wealth generally requires vast resources, which requires vast amounts of people. Behemoths the size of Amazon, Walmart, Microsoft, Google, et al employ significant chunks of the population - and not just directly.

Trickle-down doesn't mean everyone will be a millionaire by doing nothing... instead, it means a ton of smaller companies are boosted while servicing larger companies, and so on - spreading wealth around in terms of employment and providing people with a living they can fairly earn.