Except it won't - companies which are fully open source won't have any additional costs, and their products can be priced the same as normal.
It's only companies who have fully closed tech will have to pay the tax, and really that tax is compensating the rest of the country for the work and knowledge that company wants to keep secret.
For example, the tax could be 1 cent per page per day which is non-public.
It would apply to source code, images, or anything else that might be reasonably printed on a page.
Then companies could pay the government to keep their employees work secret, or publish it.
It should help innovation as far more work done by humans gets made available for others to build from.