^^^ Would have added "admin" in thread title if it fit...
Added it in the post... but you appear to be too dumb to read it.
Also - no new laws need to be passed. Just enforced. It is already illegal to knowingly hire illegals.
Yes, there are laws in place for this, although the key word you used there is knowingly.
A lot of the reasoning behind the prosecution numbers as whole being so low, is that this is often hard to prove, due to the fact that the businesses typically have a form of plausible deniability that shields them. Many of the illegals will submit stolen/forged documentation, or in many cases are willingly helped by donors who allow them to use their personal info in order to aide/help obtain a job.
So, while it can eventually be proven that the company did have illegal immigrants working for them, as long as the company went through the proper channels/were working in good faith, after being provided what they believed was authentic identification etc, that whole knowingly hired bit becomes muddied to say the least. Resulting in not many cases being brought against employers.
On top of that, if an employer is going through the hiring process, and they might suspect someone is an illegal, but can't prove it, and choose not to hire someone due to this, oddly enough, they can open themselves up to a discrimination suit.
So while the process seems like it should be cut and dry, it's not nearly that simple. To say no new laws need to be passed, isn't necessarily true either, as it's clear, since the laws were introduced in the 1980's, they haven't been very effective. There are things that could be enacted to help close some of those loopholes. Like making the e-verify system standard for all employers etc, or increasing the actual dollar amount of the fines that can be levied. If I recall, the lowest fine is only $250 to a max of $2000 per each violation....and if its paperwork related, it's something like $100 to $1000 per each violation.
Mix that all together and it's easy to see why that charges usually only amount to a slap on the wrist.