Congestion actually helps solve the core issue. As congestion increases drivers begin to find other ways to get around. One electric bus could take up to 40 times the passengers of a single occupant vehicle, and transit becomes the best alternative for many commuters. In the long run cities become smaller and more accessible simply to overcome the inconvenience.
Watson, come here, I need you!
Take an ethics class sometime. Employers have a duty to provide an experience which contributes to human flourishing, taking advantage of employees because you can (due to market conditions) is unethical. Your utilitarian ethics are a very base level.
I hope that's some sarcasm about ethics being determined by market conditions. It's certainly not ethical to offer crummy jobs to people just because you can. That's pretty much the opposite of ethical.
Can two Down's Syndrome parents have a non-Down's child? if so, I think you're right!