I'd love to.
One of the things you could do as a member of Parliament is say to them that you don't have any control over projects the city and the province fund directly, but that, as their member of Parliament, you will ensure that the funds the federal government transfers will have strings attached to ensure that they get the best value possible, and also that all of your constituents are actually able to work.
Your riding, I suspect, is like most ridings in Ontario, where 70% to 80% of construction done is union free. Those constituents of yours who come and ask you why they are paying higher taxes may also ask you why they are unemployed now, because they can't work on that project, and it's the only project going on.