Because they sniff their own farts regularly.

What a lot of people don't realize is that digital wireless communictaion is so incredibly complex that very very very few companies in the world can even design them let alone manufacture them. One of the mechanisms used to prevent the proliferation of this knowledge is the spectrum regime. Because normal people are not allowed to use spectrum they don't own, it becomes very difficult for them to engage in experimental development. This means you need experiments to happen in institutions. And those institutions can't use spectrum they don't own either. So companies buy up spectrum licenses and then fund the research and development and then privatize the results and keep it locked away.

Imperialists think this is going to keep the pace of innovation within their control. And they were right for a good long while. We still don't have open-source firmware for chips that work on even Part 15 unlicensed spectrum, let alone on chips with proprietary designs.