Financial crimes, no. Holding them hostage isn't useful or productive. As long as they are cooperative with investigation, let them be until a verdict is reached.

It's too easy for governments to accuse people on a whim of financial "crimes" that aren't really crimes. That sets a very bad precedent for misuse of power. Next thing you know they'll be randomly arresting people from their bedroom for suspected tax evasion instead of auditing them. Not good for those who did follow the rules.

There are real crimes, yes, but there is too much grey area and there is no danger to people or property to let financial crime suspects be at home.