If Congress sides with Internet radio services, it will also be a law. Negotiations happen in Congress, too - as well as pressure from lobbyists and constituents. Do YOU want to be the Congressman who tells vast numbers of your constituents that services that they've enjoyed for free will now cost them money? You can continue to quibble, but neither of us has a crystal ball into the actions of Congress, or the negotiations going on with SoundExchange.
The simple fact is that the cost of running an on-line radio station is significantly less than running an OTA radio station. Royalties only apply if you have listeners. If you have listeners, you have the ratings that you need to sell more web-site advertising, or more visual ads to go with your audio stream. There's also the content issue. You can stream content that can't be broadcast because the technology exists for parents to block individual streams.
Internet radio is here. It will spread as more and more wireless access is available and rates for access drop. It will also spread as other devices - like smart phones and Internet radios - get cheaper. Radio needs to look beyond the end of its nose and address the challenge. Further use of syndication is not addressing the challenge. Radio companies need to focus on their own content, and become a unique source for content, both OTA and on the Internet.