I assume they will strengthen any tunnels to attempt to withstand a strong earthquake, which will make the project cost 5 times as much and take 3 times as long to complete.
Don't count on it. Here, they hire as much uneducated illegal alien help they can get their hands on and pocket as much as they can. This state is a mess. We have 3/4 of all illegal aliens in this country living in Los Angeles. Bernard Parks is pushing that all home improvement centers house an illegal alien day labor camp outside. The Catholic charities of Los Angeles must be growing tired of sustaining them.
Gallows humor aside, the real problem is that government lacks the ability to make new people moving into an already crowded region bear a proportionate share of the cost (since most of them are illegals): instead the poor sods already there wind up paying most of it in taxes.
This is no slight on Mexicans, or illegal immigrants in general; most of whom seem to work hard in my experience. The problem is with the employers who hire them and the politicians who let it all happen, knowing it is economically unsustainable in the long run. And part of the reason employers hire them is because the tax and regulatory environment in California is such that they can't afford to pay wages to attract American citizen workers (of whatever ethnic background).
Around and around it goes. Ain't liberalism wonderful?