You see there exists these little things, some of which are mandated by the .gov, which increase the cost of labor and that increase is often a percentage of said labor. In the construction industry workers comp, liability and other insurances (sometimes referred to as labor burden) are a huge portion of that and are always a percentage of what the employee is paid.
I am assuming of course that you are not advocating removing the requirements for things like liability insurance, right?
http://www.investopedia.com/terms/b/burden-rate.asp
If you need more help understanding the concept the above might be useful.
So again, the actual costs to the company will be greater than the additional wages paid to the employees. Thus it is possible that prices go up more than the wages did but even if they don't and prices increase exactly the same as wages, no one has been helped whatsoever since they still have the exact same purchasing power. The math isn't really that hard but if you need further assistance I would be happy to oblige.