[toyg]

> where this [...] sentiment of letting people ride public transport for free has suddenly come from?

It has been there since public transport has been a thing. Its popularity ebbs and flows with the years, because it's fundamentally very appealing: dealing with tickets and tariffs is a huge annoyance, and everyone resents it for one reason or another. "Surely there is a simpler way!"

Alas, ticketing systems seem to be the less-worst thing, a bit like representative democracy as a system of government. Free-for-all attempts never survive an economic or budgetary crisis, and tickets are the closest thing to an objective method to raise funds for a service. Maybe technology (and politics) will eventually evolve enough to develop fairer means-tested systems.