Gas-powered cars vs. Hybrid Cars

Corporate Average Fuel Economy (CAFE) has set standards require average mileage must be 27.5 mpg. If an automobile maker sells one hybrid car that gets 60 mpg they can then sell four big expensive luxury cars that only get 20 mpg. Gas powered cars produce pollution generally gets poor gas mileage. An electric car produces almost no pollution but it can only go 50 to 100 miles between charges, which may be inconvienant for some people. Why should we build hybrid cars? Hybrid cars reduce tailpipe emission and improve mileage. But when you think about it if a automobile maker can sell one hybrid car and then get to sell four luxury cars then are we really doing that much to reduce pollution?