Here is the basic problem. When you build a product for savvy people, your interests are aligned. Savvy people will only pay you money when you build a good product. Thus, the only way you can make money is by actually doing good, by creating a product useful to other people. This is the happy coincidence that draws so many to entrepreneurship - we get to build things, create value, and get paid $$$.
When you build a product for less than savvy people, the easiest way to make money is by tricking them. Even if if you do not want to play dirty, you will be driven out of the market by people who do. You will be competing against people who make something look like a great deal (no down payment, zero percent APR!) but where it turns out the customer is getting screwed in the long term. You might want to sell a fair product, but since you are selling to less than savvy people, they ignore your product and buy the product that is tricking them, that looks like a better deal than it is. When less savvy people buy good products, it's usually products that are being passed on via reputation by the more savvy set. Thus if you want to build good products for the underclass, build it first for savvy upper-middle class people, and if it is good, it will eventually filter down, like email, smart phones, and a hundred other technologies have.
When you build a product for less than savvy people, the easiest way to make money is by tricking them. Even if if you do not want to play dirty, you will be driven out of the market by people who do. You will be competing against people who make something look like a great deal (no down payment, zero percent APR!) but where it turns out the customer is getting screwed in the long term. You might want to sell a fair product, but since you are selling to less than savvy people, they ignore your product and buy the product that is tricking them, that looks like a better deal than it is. When less savvy people buy good products, it's usually products that are being passed on via reputation by the more savvy set. Thus if you want to build good products for the underclass, build it first for savvy upper-middle class people, and if it is good, it will eventually filter down, like email, smart phones, and a hundred other technologies have.