I might be wrong, but they use their company name to buy those luxury cars. It's cheaper, i don't know how much. But roadtax or insurance might be much expensive compares to if you buy under your own name. Then after like 3-5 years, the owner can buy off the car cheap from their own company and then changed ownership to their own name. Again i might be wrong though, see if there's some real experts here might able to correct me.