Colleges and universities have become Marxist indoctrination centers.
A prime reason why I went for a Diploma in a trade instead of an all out degree.
Add public schools to your list. That’s where it really starts.
Plus!
You want to all but shut down a child’s mind? Get them interested in sex. Government worker teachers hand out condoms to grammar school kids.
So what's the net effect? Everyone opining on 'indoctrination', the impact of continuing education, etc, which leads readers to completely miss the point. Now, let's replace liberal with statist and re-consider the conclusions.
The first, and most obvious, is that as a society becomes corrupt, the state begins to gain increasing power in everyday affairs, including economic activity, social decisions, police power, etc. As such, the state needs additional personnel in which to conduct its affairs, and turns to credentials for many/most hiring decisions.
Enter education - the longer one attends school and gains additional qualifications and/or advanced degrees, the greater opportunity they have of gaining a position within government.
Since this is a gravy train operation devoid of all competition once one has secured a suitable position, then the completely natural course would be to pursue this kind of career path in one were so inclined. It has nothing to do with some well developed understanding of political economy, history, etc, but simply a means of achieving some measure of financial security.
One of the (many many) challenges Trump faces is if he would like to restore the US to any measure of traditional values, then he would need to greatly reduce the size/influence of government. Reagan tried but failed; we shall see going forward.