I ask because we had a situation in Ireland just like this many years ago. It was for welfare fraud specifically and faced criticism for a few reasons. One was that the suspected levels of fraud may have been much lower than the politician was claiming. The other reason was that the cost of tackling it could likely outweigh any savings.
Don’t allow what is not allowed. Maybe the initial cost ia higger but doesnt incentivise the following persons to follow and do the same.
And if it really costs more, just increase the penalties to make it worthwhile.