1) I am sure US totally wants to steal information on any stealth fighter developing in China. They want to know what they are making. And I am sure there are many efforts in progress to gain as much information as possible.
2) "Free" vs "Un-Free" is not the determining factor is innovation and scientific achievements now or into the future. You should be more worried about spending on education, society's attitude to science and bans on things like stem cell research. In the spending on education and society attitude to science the US is lagging many other nations.