Regulators or a team of financial auditors, are they necessary or unnecessary? The barrier to the unimportance of their existence is trust.

The loss of public trust in the honesty of the people who work there. Because the reality of their work is even more detrimental to people than the need for them to exist as a trusted team to crack down on money laundering crimes.
The most basic thing is that they protect the existence of people who teenyata often or indeed do money laundering. The pretext of protecting the weak will be said for the country, but it is disguised under the hood of their desks and ties.

It is ingrained in every state financial body that deals with finance. Collusion, corruption and nepotism are the conditions of clarity of the work they actually do. Fighting for the independence of their own kingdom rather than the country they live in.
The government is indeed the mastermind behind everything, although not all but most are members of the existence of the establishment of the kingdom behind the state. Such is the tragedy of the world financial system that has actually occurred until now. There is no more freedom for ordinary people or commoners. All is just a mere game act.