1. On the contrary, Voos. A state is mandated by the Tora. See Rambna, Sefer HaMitzvot, mitzvot that Rambam “forgot”.
2. Even in a Tora state the punishments for aveirot ben adam laMakom will not be enforceable because of the procedural problems and technicalities of acceptable proof. The king (or whatever governmental authority there will be) only has authority regarding aveirot ben adam l’chaveiro as stated by the Avnei Nezer in Yoreh Deah 312:50:
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