As others have commented this is not possible because it's not my choice to make the switch.
But more generally I see it like this: Without the law, Google would not exist as a legal entity. Incorporation is what allows Google to become a legal entity and it is also what protects Google's owners from having their personal possessions seized in case of insolvency.
So Google's owners have asked society for protection beyond what is provided solely based on market principles. In other words, they wanted rights, not just incentives.
I'm asking for the same thing. Rights that are independent of my ability to pay and are difficult to emulate through market mechanisms.
How do I do that? I'm trying to switch but I can't find the option that makes my customers use Bing to find my site. No matter what I do, most of them use Google.
(</NaiveToMakeAPoint>)
In other words, the people who need more transparency aren't the ones who can choose what search engine is being used.
I am not you have any idea of how long it takes for General populace to realize that they are being screwed.
Ordinary people don't yet know because they trust Google - A trust which was build by constant "Don't be evil" rhetoric for over a decade. This trust also helped them acquire a monopolistic position so when they break that promise they need to be investigated.
Search is now a public utility and Google should be treated as utility provider.
No private company is required to give transparency. The ones that claim to can be lying about it. Email is way more important than people realize and yet nobody gives a shit.
If people wanted transparency they'd switch to companies which are transparent.