Thanks for the qualification on "classic liberal".
By my understanding of history, Alexander Hamilton is a good example that meets the present-day form of "liberal", or collectivist, as you so aptly described. Hamilton was the patriarch of this brand of liberal politics. I doubt he was alone but he was among the first in USG to openly promote the idea that members of USG were obligated to apply liberal interpretation of the Constitution. This is to say, if/when/where the Constitution was silent on a given matter, Hamilton advocated that USG was obligated to fill in the silence however they may. This was the basis of his argument used to convince Washington to approve the charter for the FBUS - First Bank of US. It is difficult to construe this decision - public holders of office delegating (giving away) their authority, by way of legislation, over the nation's money/banking issue, to private interests, many of which were foreign interests, some of which were THE VERY SAME INTERESTS THAT YOU JUST CONCLUDED A BLOODY REVOLT AGAINST - as a conservative act.