There's a flaw in your logic. Neoliberalism is endemic to both parties. Privilege allows either and/or both parties to continue to function as controlled opposition for each other and as puppets for the oligarchs. Please check out these resources:
https://medium.com/@allenkithowell
https://www.youtube.com/channel/UC_ALrQNOIs04v_7y6yTAY6g/videos