In Britain, liberalism was architected primarily by people who were part of our very old establishment. The decriminalisation of homosexuality was achieved largely by the work of Lord Wolfenden, Lord Pakenham and Arthur Gore (8th Earl of Arran). The same goes for most of the political changes we associate with modernity and progress - with the notable exception of Bevan and his peers, the people turning the wheels were mainly minor aristocrats in dusty tweed. A great many of the most significant changes were made contrary to public opinion, the most obvious being the abolition of the death penalty - a policy which most Britons still oppose.
The boomers credit themselves with having changed the world when they were young, broke and essentially powerless, but deny any credit to the generation that constituted the establishment at the time. Conversely, now that they control the majority of capital, make up the biggest electoral demographic and holds most of the elected offices, they deny responsibility.
The most destructive act of the baby boomers was creating a culture in which the individual is seen as having supremacy over the institution. The consequences are obvious and stark - a political system with single-digit approval ratings, where nobody feels represented and nobody feels responsible. A political culture defined not by fundamental ideological allegiance and difference, but by special pleading. There's no such thing as a socialist anymore, no such thing as a conservative or a trade unionist, just people with opinions. America always pretended to be classless but Britain has gone the same way, preferring the egoistic fantasy of an egalitarian society over the reality of one where power and wealth and privilege are still very much in force.
We're trapped in a solipsistic nightmare, where conspiracy theories have replaced an understanding of social power. Until the people who are in charge actually admit that they are in charge, we're fucked.