> Why don’t they speak up to their employer who can then raise it with Google?

That's not how incentives are aligned. The employer is incentivized to provide Google a service at maximum value with minimum cost and inconvenience. When an employee at a contracting agency complains, the easiest solution to the problem is to take them off the contract.

When I said tip of the iceberg... Now consider how those incentives work when the issue is harassment.

You are assuming they didn't. If they didn't, they probably had good reasons to believe that speaking up wouldn't help.

The NLRB's ruling is that since Google has so much control over the work conditions, Google has to be directly involved in negotiations with the workers' union and thus has to listen to things like "Please turn the AC on where we work on the weekends."

But working in the 21st century is paradise, and no one who doesn’t *want* to be taken advantage of or mistreated or forgotten about ever is because the market is totally free, and there is no such thing as power imbalance when negotiating with a company. Unions just aren’t necessary. Corporations are wonderful, and they don’t withhold information that could be bad for business, but good for the public. Their product is made with complete openness, and everything is regularly reviewed and audited by independent, unbiased watchdogs. If they don’t like their conditions, they can leave at any time, as long as they leave individually.