You do not seem to understand how patents work because of other comments thinking that you can patent something without publicly disclosing the invention. In and of itself, this comment is silly because the answer to your question "What do you think will happen if IP becomes impossible to afford, as it surely will under such a policy?" is "exactly what happens when patents expire currently." It appears you are unaware that companies still invest in R&D knowing they at most get a few decades of exclusive rights.