If a corporation lays off any people in a particular job category/title, that corporation should not be allocated ANY H1B visas for that job category/title for the next year.
If a corporation institutes any policy that requires decimation (or any other statistic-based termination program) of employees with a particular job category or title, or if IN EFFECT they perform this (because they will just hide it otherwise), then they will not be allocated any H1B visas for that job category or title, for the next year following any such act.
In essence, the point here is that if a corporation decides it can live without X% of their workforce, then they don't get to go bring in foreign workers. The H1B program is to help find workers for positions that can't be filled; if you're laying off or mass firing people then obviously you CAN find people to fill those jobs.