A point to add to the above:
If petitioners won't be able to advance their career, then the corporation will have experienced, over-qualified workers clogging junior positions for a long time. The company will have no motivation to raise their salary. So now you have under-paid, experienced workers willing to stay put, and their employers love it.
This means that qualified American citizens will have no chance competing for this job. So, delaying petitioners' approval actually hurts citizens' job opportunities, and it is uscis's fault that this happenned.
If petitioners won't be able to advance their career, then the corporation will have experienced, over-qualified workers clogging junior positions for a long time. The company will have no motivation to raise their salary. So now you have under-paid, experienced workers willing to stay put, and their employers love it.
This means that qualified American citizens will have no chance competing for this job. So, delaying petitioners' approval actually hurts citizens' job opportunities, and it is uscis's fault that this happenned.