> the only solution is to enforce bans against illegal transactions
And that has happened (for a very very long time now). The key problem being "enforce". Enforcing works up to a point and there is always the need for a cooperative public. The moment the public is distrustful of this institution (or any institution for that matter), everything goes down the drain. Look at https://ec.europa.eu/commfrontoffice/publicopinion/index.cfm... for the level of trust in the government greece has.
And that has happened (for a very very long time now). The key problem being "enforce". Enforcing works up to a point and there is always the need for a cooperative public. The moment the public is distrustful of this institution (or any institution for that matter), everything goes down the drain. Look at https://ec.europa.eu/commfrontoffice/publicopinion/index.cfm... for the level of trust in the government greece has.