I agree that in contrast to regular crime, there is no need for prison for incapacitation purpose of punishment, some record forbidding any kind of entrepreneur

I agree that in contrast to regular crime, there is no need for prison for incapacitation purpose of punishment, some record forbidding any kind of entrepreneurship or managerial posts would be enough. For reparation purpose of punishment, garnishing the income would be enough. But there is still deterrence purpose of punishment - if you remove prison from considerations, it significantly changes risk calculations for white collar crime making it much more profitable.