Well it is plenty realistic then. Ok Julia might be married, plenty of people are . And she may have social networks (on Facebook? haha) etc.. There's dozens of sociologist documenting the decline of community and friendships and so on but we don't have to posit that Julia is a total loner (although it seems more and more common - that or cacooning - people's priorities are all wrong!).The cartoon mentions no family save for her son, no friends or social networks, no community. Nothing beyond how the state will take care of her at every turn.
But no, how it is realistic is not that, but rather in that not many people have the type of community they can call on to do what unemployment insurance does in periods of job loss, or Social Security does in old age. You are free to argue that such a society should exist (for unemployment it's probably doable, Social Security is a hard one - really hard to replicate what the government does there), and hey such additional protections from job loss would only empower workers more , but to argue that it is what many workers face now ... um no it's not. And unemployed workers now use those unemployment checks for basic living expenses.