C Northcote Parkinson, in "The Law and the Profits", pegs the turning point for Britain was 1909, when the taxation and socialist welfare state emerged.
Considering the conservatives who hate taxation and the welfare state have been in power for 77 years versus the 30 or so years Labour have had, I'd love to know how the author arrived at said conclusion.
I'd speculate they were either lying about their motivations or ineffective (maybe both). UK government spending has consistently trended up over the last century [0]. It follows a pattern of large expansions then small pullbacks. Of that, social spending basically only goes up (there is a graph a little down the same page).
Public debt, as a share of GDP, peaked at the end of World War II and then gradually declined until the Reagan tax cuts of the 1980s, which led to record deficits. Since then, the debt-to-GDP ratio has steadily risen, almost reaching its 1946 record in 2020. Only during the period 1996-2000, under President Bill Clinton, did this trend temporarily reverse.
~ America’s Mythical Fiscal Conservatives (2023)
and numerous other pieces from across the US spectrum
Unfortunately, what Republicans really represent – implausible spending cuts, poorly targeted tax cuts, and empty threats to push the US into default unless IRS funding is cut – can only make the long-term fiscal outlook worse.
Reality tends to run counter to many libertarian talking points.
What part of that is running counter to libertarian talking points? The libertarians have been pointing out that the Republican party is a fiscal disaster for a while now. As you pointed out it is just a matter of looking at the results to see it.
Having read (US) libertarian talking points for roughly four decades now there's very few things that run counter to some libertarian talking point, they're an extremely broad tent with many poles that stand at all angles, some that lay on the ground.
Given there's no real core I'm happy to leave the libertarian part out and reduce to just poking fun at the notion that US conservatives are fiscal conservatives bravely trying but failing to keep their fingers in the dyke.
FWiW I'm no particular fan of the other party in the US two party system, it's about time somebody took Ben Franklin's advice and opened the field up.
Still, it's an iterative consequence of a voting system that didn't scale well that the washington system came to where it is.
https://www.amazon.com/Law-Profits-Cyril-Northcote-Parkinson...