As far as I can tell, Austrians believe that analyzing based on individual preferences and actions is the key. I haven't made it very far into Mises Human Action, but I gather that was the starting point and Mises developed many theorems based on that. So if you say that allowing individuals to maximize their preferred choices given the constraints around them is "the market" and artificially restricting those choices, using acts or threats of violence, is "the government", then yes, I suppose that is their framework. One of the main things they would probably push back against is the notion to think of the market or government as independently existing entities. The government is just a collection of individuals who use violence to impose their will on others in a way that most of the society is agreeable to, at least to some extent, and, because they are individuals, they have their own preferences and actions which can also be analyzed in this framework. If you think people in the market do things that are nasty when all the actions are voluntary (and that certainly can happen), shouldn't you be even more skeptical of those who are willing to engage in violence to force the things they want to come to be to happen?
Austrians would also object to the notion of something being perfect. But they do analyze situations in which an external force interferes with the normal voluntary flow of actions and generally find that the stated outcomes (probably not the actual desired outcomes) of those external forces is generally not met. For example, rent control is often argued for as about helping more people to be housed and, empirically, that usually is not what happens when rent control is enforced. One could argue that the real intent of rent control is about making life better for the well-connected at the expense of the less well-connected and that probably does happen regularly.
