Welcome workers

I'm curious, they held hearings in Congress recently about a stimulus package in the form of a transportation bill - something about repairing the nation's infrastructure.

Now, from what I understand from the CIS group, illegal immigrants tend to work in construction and service industries. If I am correct, then is there a risk that the passage of this bill will most likely benefit illegal workers and their employers, rather than employ legal immigrants and native Americans? What if any controls are in this bill to prevent such abuses?

Discuss.