You say there is always a risk. That is obviously the case. When a wallet is lost, the social insurance card and other relevant information is also lost, especially the information on a driver's licence. However, 500 000 wallets are not stolen every year in Canada.
As for your department, in one fell swoop, the private information of 500,000 individuals was lost. The scale is not the same. On this front, the Information and Privacy Commissioner indicated that, among all federal departments, only 4.4 % of incidents involving lost information were reported to her.
Don't you think that your priority should be to better secure your internal data transmission networks, rather than tell Canadian citizens to be careful of pickpockets?
I do not believe that 500,000 wallets are stolen every year in Canada. The main source of danger is not that citizens loose their wallets, but that their identity could be stolen. The problem with your department is that it is not always a good custodian of the information that it maintains and protects.