I don't think it's as bad as you mention. Even if copyrights are treated as property, that would not mean that you can easily outsell and then own it. For copyright is should be that you set a price and whoever wants to use your copyrighted work would have to pay the said amount (or less if they get a better deal from you). For linux that would mean, everybody who pays the fee set by Linus is allowed to use Linux. As Linux is free to use anyway, Linus would not have to pay any taxes at all. Only when you want the government to give you any protection from people using your copyrighted material without your permission, then you have to pay taxes.
So open source could still be copyrighted and still be free. The licenses might have to change, though...
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I don't think it's as bad as you mention. Even if copyrights are treated as property, that would not mean that you can easily outsell and then own it. For copyright is should be that you set a price and whoever wants to use your copyrighted work would have to pay the said amount (or less if they get a better deal from you).
For linux that would mean, everybody who pays the fee set by Linus is allowed to use Linux. As Linux is free to use anyway, Linus would not have to pay any taxes at all. Only when you want the government to give you any protection from people using your copyrighted material without your permission, then you have to pay taxes.
So open source could still be copyrighted and still be free. The licenses might have to change, though...