What did/do the liberals and the Leninists had/have in common?

First realised and posted this analysis, in Greek, in 2004, at the online forum of the Bulls (www.bulls.gr), a then liberal party in Greece.

Their sensitivity against oligopolies and cartels.

For their differences, see my full analysis, as written in 2004 and posted here later:
http://npthinking.blogspot.gr/2012/10/what-do-liberals-and-leninists-have-in.html?spref=fb