I didn't have time to finish the thought, but yes, that could happen. If it does then the city changes the law or dies. It should be more or less a wage that is above slave labor but below what an entry level person should receive for their work depending on the local market and cost of living. 

Ideally, though what people should be asking is for the government to re-evaluate taxes, regulations (compliance), licensing, etc. that is making it more cost effective to go elsewhere.  In the end we are the ones that pay, consumers and workers.  

Competition isn't just good for consumers, more businesses and less unemployed means competition by companies for employees. You don't want to have a labor shortage, but right now we have an overabundance of labor looking at the BLS statistics. Younger Americans aren't entering the workforce as early and older Americans are keeping their jobs longer. 

Part of the problem is that the US has shifted from a production/manufacturing based economy to a service based economy.  Most services are low paying, those that aren't are being outsourced as the technology becomes available to do so.  

An upcoming project I may be involved in is outsourcing labor, they can pay someone $25k to put together a software application as opposed to the $45k an individual wanted here.  There is no incentive to hire someone in the US in this situation.  How do we encourage companies to hire locally when someone will work cheaper in another country?

The problem isn't just about minimum wage, raising it/lowering it won't help unless other policies are re-evaluated and more jobs are created. 

This is all off the top of my head.. didn't reread and edit it. Busy day but I wanted to respond. Sorry if I repeated myself anywhere or if I don't make my thoughts clear.