"Are Republicans on a mission to strip Americans of all their rights and civil liberties?"
They honestly don't care. They just want to stay in power by preventing government insolvency while still appealing to their voter base: capitalists, militarists, theocrats, nationalists (also known as racists), Chinese and Saudi bond-holders, and the independently wealthy.
"Are Republicans on a mission to institute a system of government by the few?"
They don't really have a mission other than to stay in power, to be celebrities, and to collect a pension when it is all over. They can't do this if the government goes bankrupt and the economy collapses. On the other hand, they do love the exclusivity of holding office. They would like to keep participation in it minimal, because they are egocentric and hate everyone. Democrats are the same way.