IANAA, but…
See, the tax regimen there has not caught up to the North American standard.
If the company gives you (or leases you) a car, it is a taxable benefit, all expenses are the equivalent of salary; you must pay taxes on them. To claim that some of the expenses are business-related, you must keep a log of how many miles you drove on company business. Driving to and from your regular place of employment does not count (commuting is not deductible).
If you were planning on spending that much anyway, then so what? Take the darn car. But for some people, that’s not the car they want. Others want a less expensive vehicle, or a different vehicle, etc. Money is usually better than a benefit.
It used to be that an employer-supplied perk like that (or free housing, or membership in golf clubs, picking up a restaurant tab, or use of the corporate jet for vacation) was not taxable. However, the perception was that these benefits were unevenly accruing to the “fat cats” of business, so should be taxed at the equivalent market rate. Once the car costs you money (admittedly not as much as if you got it yourself), maybe you want the car YOU want instead?
Yeah, you don’t get to keep it. You pay taxes on the lease amount every year. If you buy a better car but keep it for 10 years then maybe you’d be better off if they gave you that value as money instead of a company car - taxes would be the same.
Plus, if you have your own car and need to use it for company business, would it be simpler for the company to write you a cheque for mileage using the Revenue Canada standard rate (IIRC, about 42 cents a kilometer)?
Do the math sometime. Figure on the total cost of lease, insurance, maintenance, registration, etc. on a new car evry 3 years - then figure out whether if the company gave you that same money cash, you could do better on your own?
Where was it, Chrysler, where a state trooper pulled over a guy in a brand new car many years ago? Noted that the odometer in the middle of the continent read “0”; the investigation revealed that execs routinely were allowed to help themselves to a brand new car off the line, disconnect the odometer (now illegal in the USA) and put it back for sale as “brand new” when they returned thousands of miles later.
Even if Ford makes Fords and supplies Fords to its workers (or the fat cats) they still have t pay taxes on the equialent value as income.