OTTAWA—A new report on billions of dollars the federal government has sent to provinces to help safely reopen the economy suggests much of the money is sitting unused. Today’s report also suggests that federal efforts to stretch the financial impact of those dollars is falling short as many provinces have bucked cost-matching requests. The analysis by the Canadian Centre for Policy Alternatives says six out of 10 provinces haven’t spent all the money the federal government has sent their way, including for things like personal protective equipment. Author David Macdonald says some of the money may yet be spent, but notes the longer it remains unspent, the less likely it ever will be spent. Macdonald’s analysis is based on a review of provincial and federal spending announcements, reconciling duplications, as well as provincial spending documents. Federal and provincial governments are allocating hundreds of billions in direct spending and liquidity support to help workers, families, front-line workers …