One of the things you have to take into account is that a lot of these tech companies grew in the gaps of regulation, while legacy companies were forced to abide by standards and regulations; for a lot of tech companies, they broke the markets and thrived in the infrastructure paid for by taxpayers.
Uber, Airbnb are good examples of this. When regulation caught up with them, the damage was done for better or worse. To this day, some regulators still struggle to keep up due to the lack of resources, and the tech does achieve this... and now you have tech oligarchs dismantling the government bodies responsible for regulation.
So I don't think it's just a matter of people upskilling to generate more value, because people pay taxes for the work they do - they can't afford the lawyers and structures to avoid this. The people who have the luck and the opportunities to generate this kind of value are already doing it, or will do it, or don't want to do it.
So while I agree with you, and people should have access to the opportunities to upskill and to generate value, I also think there's a massive gap in income and taxes in a lot of democratic countries. These things can go, and should go, together.