Yes, some small town cop might not have any oversight and if he starts requesting phone records of "famous" people it can quickly become a huge issue not that warrent-less access isn't already an issue for everyone else.
One of the big Snowden revelations is using NSA spying to do just that was so common place that co-workers were suspicious of anyone who didn’t illegally spy on exes or random crushes.
Not even the NSA has a database of famous person phone numbers. Most of the rich and famous don't have phone numbers, or even mailing addresses. They have companies that in turn manage their devices and properties, usually run through a "family office" of attorneys and accountants. So the NSA will have a list of numbers associated with their production company or family law firm, which would require further human investigation to determine which was actually in a person's pocket day to day.
Politicians have started adopting such structures too. House Speaker Mike Johnson famously has no bank account. He does, just not under his name. It would be managed by his family office.
I worked for telcos, and the rich & famous & royalty typically had their accounts restricted from access by regular CSRs. I know there were restrictions built into the internal systems, though it didn't apply to my role.
Now the elite use Telegram groups, Signal, and rotate SIM cards. Everybody should be doing life this way, so the telcos become dumb data pipes.
I don't think this is close to universal among rich and famous, although no doubt you are correct about some. For one thing there is a principal agent problem in giving this kind of personal service company control over all your comms. Big impersonal companies can be more relied on to treat everyone the same. Many famous people will just sign up under a pseudonym.
Family offices are also an artifact of generational wealth. Plenty of famous people aren't rich enough for something that heavily staffed. Also newly wealthy will often want to be able to deal with existing friends and family on the same basis as before.
Indirectly, I've been able to observe some of the habits of someone with stratospheric levels of wealth. They had a phone number, but changed it frequently.
In some respects, uber wealthy and street/cyber savvy criminals act same: use intermediaries, use cash, use trusts incorporated in states/places, where it is hard to trace beneficiaries, burner phones bought with cash, by intermediaries, frequent change of phones, no trace of their names on data brokers, consultants who help get rid of any trace in data brokers, etc.
You seem to be under the mistaken belief that cops are held accountable. They’re not. Accessing Taylor Swift’s text messages is least dangerous thing cops of all levels regularly engage in.
Until someone complains to the press, then it’s one of the more common ways LEO get fired.
Agencies will throw officers under the bus at the slightest provocation to save their own asses. The easiest way is if they get caught violating policy. Officers will often work hard to find out how to not get caught/the cracks in the system, vague areas of policies, etc.
It’s always been a cat and mouse game. Same in the military, except the military doesn’t have to deal with civilian courts and shit rolls down hill more explicitly.
Cops are almost never fired. Placed on paid administrative leave pending the outcome of an investigation? While the press is in a tizzy? Sure. Fired? No. Almost all cops found in violation of policies win on internal appeal. Even in the extremely rare case when they are fired, they’re rehired in a neighboring jurisdiction post haste.
The courts? PUH-LEASE! Prosecutors never prosecute. Even if they go to a grand jury, they end up instructing the grand jury to pass a no-bill (i.e. not enough evidence of a crime), thus letting them was their hands and say, “Gosh! The jury didn’t indict. Can’t do anything,” when in actually grand juries indict everyone. (When I was on a federal grand jury, the AUSA told us that if we were going to pass a no-bill, to tell him so he could bring more evidence (a legitimate ask) and told us that a no-bill would result the a call to him, and his boss, from the Attorney General himself.) Then of course there’s qualified immunity and case law that is overly differential to police actions — even when they violate procedure.
It’s bullshit. Cops are completely unaccountable. They’re gangs.