Apologize in advance if I over explain somethings or repeat myself with different wording, I'm not infantilizing you I'm just trying to be very clear.

I use industrial and agricultural labor as examples because they are typically more dangerous work and often more heavily exploited but even your manager is technically a prole. You're friends that manage a finances are proletariat. If you sell your labor and the person purchasing that labor makes extracts surplus value from your labor, you are a proletariat.

Specifically, the capitalists who run the company you work at purchase the labor of those finance managers and extract a profit from their labor while doing essentially nothing other than being the person who owns the business and the capital required to produce whatever it is their workers produce.

Think about how a business is run. You have workers, the proletariat, who provide their labor in whatever form required whether physical or mental in exchange for a wage that they can then use to buy whatever necessities they need and extras they can afford. These workers are alienated from the product of their labor; they do not own the product nor do they own the means of production, they are also paid less than the product they created is worth so that the capitalist who does own the product and the means of production can extract a surplus value. In the case of your financer the product of their labor is literal money, they produce money for the capitalist and see very little of it. Their wage is what the owning class allows them to have. In a cruel twist of fate they are then required to give that wage back to the capitalist class in exchange for food, housing, electricity, sometimes water.

We still do have proletariat working ungodly hours in dangerous factories though, they are often just immigrants and minorities, sometimes children. I'd link a source for that but honestly just look up working conditions of abattoirs, specifically Tyson chicken. Or the laborers being exploited in that manner are just in another country worker for the same capitalist and getting paid less than the US minimum wage because it means the capitalist can extract more surplus value.

The problem with regulating capitalism is the that under capitalism wealth accumulates into fewer and fewer hands over time. This happens for a number of reasons but the primary being that wealth is easier to accumulate when you have it. A bigger business can buy or outcompete a smaller business, sure we can bust monopolies but it doesn't really matter if every company in every industry is primarily owned by a few people. Creating a society where capitalism is more heavily regulated and with social safety nets would only be temporary. This is seen in Nordic countries where in the pursuit of profit their capitalist class is lobbying against any further nationalized industry and actively attempting to roll back those social safety nets. The only reason those places were even able to develope social democracy is because of the giant red superpower right next to them at the time. Had the USSR not been their to provide Nordic proletariat with the threat of a supported revolution the capitalist class would never have given those concessions.

Das Kapital explains it better than I can if you're that invested into the topic but it's a tough read.

the Marxist project is also a great start from an academic lense and is easier to digest

Sorry for the abundance of text lmao, I have no idea if it's coherent because I wrote it sporadically over the course of an hour and it's like 3 am