Originally this was a strategy devised by Otto von Bismark, a Prussian conservative who thought providing concessions to workers might help keep the communists out of Germany. He succeeded.
Over time, it turned out that social benefits can actually be quite effective for other reasons too.
Today, many OECD countries are explicitly social-democratic. Some countries claim to not be socialist at all, but still do have some (possibly more limited) social programs (eg in education and health care).
Why do people keep misusing the definition of socialism. Do workers own the means of production? If not, it's not socialism. Now I'm not a socialist but I'd like the words we use to have meaning so that we all know what we're collectively talking about.
Social benefits and social democracy != socialism, people should just use that term instead.
For so many instances of the word "social", it's difficult to see how we can't just tack -ism at the end and be happy.
A negative income tax is most definitely not UBI. You still have to work to get it, therefore it's not universal. It's a pure wage subsidy program.
UBI keeps the means of production in the hands of those who already hold them.
In particular it was as close as you're ever going to get to being "universal". For obvious reasons, every other experiment I've ever seen made or proposed was not, and I think that's a pretty significant aspect to the idea.
Tack that onto a snarled global supply chain, and it's very difficult to pull meaningful outcomes from the noise: did people increase luxury and discretionary purchases just because they could, or were they influenced by an early glut of staple food purchases? Did people increase discretionary spending to entertain children and compensate for a lack of time spent outdoors and socializing? Did they purchase more expensive foodgoods for similar reasons?
I am not a particular proponent of UBI. But I don't think we (meaning us laypeople on HN) are going to be able, from our vantage point, to draw a useful conclusion from the last 30 months' economic activity. It's simply too weird.
I'm not aware of anybody who claims that people won't quit their jobs if you (1) make them stay indoors and (2) give them money, and (3) invert the economy (justifiably!) for 6 months.
The claim that UBI advocates make is that UBI, when actually applied, is just a negative income tax. Alaska has one, and it doesn't make people quit their jobs.