There isn't a country on this planet that's successful (high gdp, high gdp per capita, etc)that doesn't use social democracy and a mix economy. Every one of the top 30 countries use it!
I wouldn't call it liberal as it is just common sense economics. Kansas is being destroyed by huge cuts and the reality that the rich wont invest within its economy as they're hard asses!!! Do you really believe that the people that move our jobs to vietnam and import cheap labor give a shit about America? hahaha. These same people have done just that and are doing everything to stop new growth of businesses and wealth within the middle class of our own society.
Social democracy is the gold standard for civilization and it isn't liberal. Point out a single liberterian economic model nation that is completely hands off on regulations, laws and investment from the government. This is why I think it is a joke as Haiti or Somalia is probably the closes thing to it.
I thank god we invest in our own society. If this is the mountain the republicans wish to die on....Well, I am a proud democrat.