I have played all but 4 missions (Many of them more than once), under many GM's and I can honestly say it comes up very little, but if it comes up and you don't have, then you may have an additional complication.
I can even think of one mission where being pulled over by the cops is written in. And as I recall, the necessary bribe went up the moment they found out one of us was SINless.
So, it does come up, but usually it's if the players draw too much attention with the cops and have no way out of talking to them.