At the core of the issues is the use of force and the NAP. One way this is often contentiously illustrated in the US is with government protected labor unions. As a libertarian, I view labor unions as the to-be-encouraged populist counter to incumbent monopolies, yet I find myself all too regularly unwilling to support them due to their violation of the NAP and insistence on socialist values/tactics. This is unfortunate, since it seems to create a de facto support of wealthy "capitalists" by libertarians in the view of detractors.
Government protected labor unions are the populist equivalent of corporatism, corrupt by definition, allowing workers to explicitly violate employment agreements without repercussions. Until government protected labor unions are abolished, they'll consistently fail to receive support from a large majority of the people that may share their otherwise noble intentions, pay for the value you create. The problem of course with socialists though is that value should be objectively decided by others, aka the _free_ market.
The software community and Silicon Valley seem to have gotten at least this part right, an oasis amongst many tragically morally unsupportable industries. (I would absolutely _love_ to whole-heartedly embrace support of the teachers union, but cannot.)