MikeAqua:
The function of a limited company is that it limits the liabilities of the shareholders and directors. The objective is to encourage people to invest in businesses. Take thta incentive away and yiu'll gte less genuine p[eople prepared to take that risk. Debtors can seek director guarantees as an additional step.
In cases where criminal conduct is involved then yes, I think directors and officers of companies should be personally liable. One problem with that is when a criminal gets a custodial sentence, they seem to be absolved of financial responsibility for their offending.
Negligence also, for example, trading when they know they are insolvent. Those new creditors can go after negligence, and thereby seek personal liability on the directors