Your analogy is flawed, Bain is not a consumer company. Every consumer business weighs costs, price and service/quality levels. Companies can try to cut costs to maximize profit by denying service or features or quality parts, whether it's Apple, Accenture, IBM or United Healthcare, but they still have to try to produce a good product or they are out of business. As long as consumers have choices then the companies have the incentives you mention (note: it's called capitalism).
If you don't like capitalism and consumer choice, maybe consider the old mutual insurance company system where the policy holders were the owners. Any profit gets paid back to the policy holders, but it is still run like a business.