Not justifying it, simply observing.

Like I take money from the company I work for, in payment for my services...

> put it into a common pot

I put it in my bank account...

> and then give it to individual B

I buy something from Amazon, say...

> then individual B is effectively getting individual A's money.

Then Amazon is getting my companies money? Erm, no. Once it's been paid to me, it's my money. That's how payment works. When you pay for a society's services, that money is no longer yours. If you're a member of that society you still get a say in how it's spent (not always the case: you might be from another society and just paying for market access) but it's not your money any more.

If I did work for the company and then they refused to pay me, then yes, I would force them to pay. I would use the law to force them to pay.