If you read the article instead of making a knee jerk assumption, you’d know that taxpayers would not be purchasing 50% of the industry.
The proposal is for AI companies to pay a one-time tax. In stock. Which would go into a public sovereign wealth fund. If the companies succeed, the public benefits. If they fail, the public-owned shares lose value.
That does not magically make taxpayers responsible for bailing them out. Owning equity is not the same thing as guaranteeing a company’s survival.