Re: Ideal scenario ... At the end of the day, if you're innocent, what's your problem?
Nice realistic example there.
However, when you're walking down the street, guess what? That's a public place, meaning it's the role of the government to protect you.
Now, they can do that in a variety of ways:
1 - Have lots and lots and lots of police officers available to cover every major street, pedestrian precinct, etcetc in the country
Of course, that'll be represented in the massive tax bill that you'd all be getting slapped with for those services, and of course, the quality of the officers will decline as the intake process is required to take 2nd and 3rd choice candidates to fill the slots. (I believe this already happens in England having worked with your cops. Not so much in Scotland..)
2 - Have a wide CCTV coverage monitored from several control rooms which are linked directly into Police networks and will actively alert officers to ongoing crime, which is then co-ordinated through Force Control Centre to dispatch officers, update live time, pass descriptions, and the footage itself which will then be the corroborative evidence.
Happens already, works very, very well in Scotland at least.
What people forget is that there are thousands of victims of crime whereby there would never have been an arrest or detention were it not for positive ID via CCTV, and there certainly wouldn't have been an arrest without the corroborative evidence of CCTV.
Assaults, robberies, sexual assaults, thefts, etc,etc.... Unless two people have seen it happen, you're not going to get an arrest. You need further admissable evidence. That's your CCTV.
Works a charm.