I'm a 'capitalism with regulatory safe-guards, protections and support structures' Keynesian-style leftist. Which I think probably covers most of the 'left' that gets referred to by news media and I could swear used to make me a centralist but here we are.
So tax the wealthy to fund programs to give mobility and protection to the not-wealthy, including free education, free healthcare, and welfare systems, and infrastructure development. The true means of production.
These then allow for a more agile workforce capable of transitioning between careers easier as well as providing more educated higher quality employees which benefits businesses long-term. Support for those unable to work due to illness or disability, be it mental or physical, is also a moral duty of society and a role of the state is to protect and fulfil such moral duties of society.
Regulations and Unions combined to reduce, alleviate and counteract climate damage and protect citizens (so both the consumers and employees for Capitalism) as modern Capitalism alone is too focused on short-term gains, the next quarter but not the next decade, so there is a need for state-driven regulation and support structures to balance this out and ensure long-term success.
Salary is not a measure of success or worth, but perceived ease-of-replacement by your employer. From the POV of a business, the 'working class' are really better described as the 'replaceable class' and the first to go as we automate more. This means as automation increases and we reach the point where you have more workers than jobs due to the replacement of basic workers with the welfare system can then be expanded into a basic living income and new systems can start to emerge.