Google did actually run this experiment. They aren't stupid and lots of people say they'd rather pay money directly rather than see ads. Because of Google's place in the ecosystem they can actually implement that.
So they did. It eventually became Google Contributor and never really launched properly. The early version of Contributor was a lot more pure than what eventually launched. It let you set a budget and compete against yourself in the ad auction, so publishers were getting the same amount of money for their content as before. I tried it out when I worked there. You could set a fake budget and Google would pay for you to see empty boxes or pictures from your own photo albums instead of ads. A few things became apparent.
One is Google doesn't serve all or even most of the ads on the internet. So I still saw a lot of ads. This made the experience feel pretty pointless.
Another is that this model is completely infeasible. The internet economy is huge. Just a week or so of browsing rapidly blew my test budget of a few hundred dollars. To see no ads on the internet served by Google I would have needed to pay a large multiple of what I paid monthly for TV, mobile and Internet connectivity.
You say you'd be willing to pay $10k per decade? Forget it. If you're a heavy internet user that'd buy you less than a month, not a decade.
Finally, this didn't opt you out of search ads. That's because Google has strong experimental evidence that ads on search are good for users. One of the longest running A/B tests the firm ever did was selecting 1% of users and disabling search ads for them. What they found was a long term trend where those users simply used Google less than normal. Without ads the results were less useful so they did the obvious and searched less. Why would Google let you pay to make their product less useful for you?