Issodhos, at the bedrock, where I think your system is falsely based is your claim that government should exist only to secure individual rights. On what is that based, other than your assumption? Why not common rights as well?
I think the only rights that can be "common" to all are those unalienable individual rights held by each and every person. Beyond that, I think the term "common rights" has the tincture of group 'rights' which is also a fiction. Yours, Issodhos
"When all has been said that can be said, and all has been done that can be done, there will be poetry";-) -- Issodhos