[Willie Green]

Like Marx, you believe in the "labor theory of value," which does not believe anything is of value unless it involves producing some tangible product with physical human labor.

Wrong. Services have value, they simply do not add value.
Services engage in wealth transference, which at times may be of significant quantity.
They do not, however, create wealth.

[staytrue]

If I mow the grass in my yard, the value of my property goes up as opposed to letting the grass grow to whatever height it desires. Tell me why mowing grass is either not a service or does not create wealth. I guess you could argue that I am manufacturing groomed land from ungroomed land but it you take that argument, everything is manufacturing. Teachers manufacture educated students from uneducated students. Babysitters manufacture cared for kids from uncared for kids. Burger flippers manufacture cooked burgers from raw meat. Movie ticket takers, manufacture paying movie goers from unpaid movie goers. But eventually, you will wind your self into an argument where all services are manufacturers and that services are equal to goods.

[AIG]

The value of service businesses is not in physically tangible products, but they create value and wealth nonetheless in the form of real money and increasing profits. The ultimate service business, the financial services industry, has created many a millionaire. A "product" does not necessarily have to be physically tangible in order to generate real wealth. When you buy any number of non-tangible products such as an insurance policy, your money is contributing to the insurance company's bottom line and helping it generate real wealth for its shareholders, make no mistake about it.