First, personally I am strongly against universal basic income (UBI). UBI is capitalist idea and its main proponents are billionaires such as Branson, Zuckerberg, Musk etc. They endorse it because they are afraid for their personal wealth and status (and maybe even life) in case of social uprising and revolution. The basic idea of UBI is to give people some crumbs from the table of abundance made by automation and to avoid hungry mobs with pitchforks while maintaining ultra rich status of owners of automated factories. This is a desperate attempt to artificially prolong the life of capitalism. Of course, I'd rather see capitalism crash within years from now and make room for something much better, so I am against UBI.
Estimates from 2018 say that technology is replacing jobs five times faster than creating new ones. It's different this time because first time in human history we have machines capable of autonomous performance. It's not replacing just low skill jobs, we have machines that can perform medical procedures, write articles, compose music, write computer codes etc.
Your examples are misleading. How many people can successfully live as professional youtubers? Tiny, minuscule percentage of all youtubers. And their paycheck is coming from advertising money, which will inevitably stop when we arrive into situation that majority of people doesn't have money to buy products (because they don't have a job).
We can already see the preliminary effects of automation in capitalism by observing the rise of freelance and gig economy. Essentially, the society is regressing back into feudalism.
Poor worker conditions power gig economy
https://www.youtube.com/watch?v=zNLXqvPk2tU
Lets examine this:
If what you said was true, then by definition people would be less employed today than decades before, because population has increased and (according to your numbers) there are less jobs available.
Yet, unemployment rates in the U.S. have always remained between the 4%-10% rate for over 60 years, despite multiple technological developments. In fact, for example right now, you have more people employed that you did 20 years ago in the end of the Clinton era during the 90's, despite the american population having increased by 50 million individuals since 1998.
In contrast, in less technologically developed countries, such as those in South America (including my own), we find unemployment rates that go from 15% to 30%.
So the numbers don't really support your statement regarding technological development destroying jobs faster than it creates them.
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Also lets review my examples:
I use youtube as an example, because it is widely known to pretty much anyone; you state that youtubers don't earn enough to make a living, but that is acually false, given most serious youtubers (those that actually make multiple videos per week) earn at least above the minimum wage, with the top 10 channels combined having made millions per year. Now the problem si that you may be including any person that sporadically uploads random videos, which is not the aim of my example.
But content creation is not just what youtube does. Consider a website that is tied to youtube such as
The Young Turks, which actually became a small entepeneurship that earns millions in revenue in youtube and employs at least 50 workers who are not video creators but part of their research team. So its not just the "streamers" who make money and get a job from it. You can find many other sites that a related to selling goods and services.
I also provided my own example of a "small side business", with the only reason it didn't grow was because I never actually invested time and effort into it (I do have a normal job).
The reality is that with the advent of technology jobs are moving from being a dependant into self-employment, but they are by no means dissapearing.