I'll chip in, but this might get long, so feel free to skip over my post if you like:
I agree, 5k isn't asking much. Remember though, the idea of a guest-worker program is anything but new. In fact, you could blame our current immigration situation partly on this last little excursion into the guest worker realm.
Beginning in 1942, the U.S. and Mexico initiated a temporary worker program to answer a need for labor in the agriculture. The program allowed for 400,000 labor workers to annually enter the nation, legally, on a seasonal basis. For a good 20 years, the U.S. created and sustained a job market for Mexican men, who became accustomed to entering the U.S., then coming right back over the border to be with their families on a seasonal basis.
Even with the guest worker program in place, many of the men that came over the border broke their contracts and became illegal immmigrants. Why? The contracts, were in many cases, broken by supervisors who stole money from the men, or would decrease the amount of money offered the migrant worker who was now legally obligated to work the farm he had committed to. Moreover, the living conditions on many farms were calcutta-style, horrendous, and came under fire from the public eye during the 60's. Basic sanitary needs were unmet, and it is not an exaggeration to call the whole process dehumanizing. For this reason, many men left these farms, and sought out farms that offered more humane working conditions and better pay. In fact, this became the preferred way to come over the border,with a 3:1 ratio of illegals to legals, and the U.S. turned a blind eye to it until the mid 50's, when they launched "Operation Wetback", which led to mass deportations of illegals. Not that this, of course, stopped any of the men from coming right back over the next picking season.
It wasn't until...lemme see...1961 (+- a year) that the Bracero program really began to slow down the flow of Mexican workers into the states, from 400,000 legal a year, to 170,000 a year. At this point, the U.S. basically made it known that those workers who had honored their Bracero farm contracts, would get the opportunity to stay in the nation, and in 65 the process of allowing the worker's families in the U.S. to join them began. Those workers who had breached their contracts, even if they were unfairly treated while initially trying to honor them, did not have the "equity" necessary to stay in this country. However, when forced to choose between returning to Mexico where there was no job for them (thereby reducing their families to poverty), and working illegally in the U.S., where the immigration "enforcement" had historically been little more than toothless policy, they by and large chose to stay in the U.S. Ironically, the end of the Bracero program forced immigrants to choose a permanent future, of either staying in the U.S. or staying in Mexico. Seasonal work was no longer an option. No surprise then, that the number of illegal immigrants officially rose something like 400% within the next year.
So, it is not as simple as "this is my side of the border, that's yours, stay on it". After all, the U.S. CREATED a job market specifically for an entire generation of Mexican workers, then stopped it suddenly in policy, while failing to adequately enforce the policy along the border. If the U.S. wants to force a hard change in immigration reality, it needs to dismantle the job market that it has created by going after those who hire illegal immigrants. This would be far more effective than putting in billions of taxpaying dollars into beefing up our physical enforcement of the border which we currently control a very small percentage of. Stop the jobs, stop the impetus for those who come into the U.S. illegally for those jobs. As long as the U.S. is unwillingly to harshly enforce it's immigration laws, they will be broken, that's a fact.
It seems wrong, very wrong to me, to foster a generation of workers from Mexico, allow it to continue by not enforcing our immigration policy over the last 40 years, then suggest totally closing our borders, completely disrupting the very fluid border process that has been extant for as long as anyone on these boards has been around. Furthermore, if we are to call the illegal immigrants who build our houses and lay our streets along the border "criminals", we should also call the small business owners, construction supervisors, and landscapers who hire them, "criminals" as well. Honestly, if you buy or hire services from these criminals, you too, are contributing to the illegal border economy.
At the same time, a nation has to have borders, otherwise it has no real control, no ability to protect it's citizens' well-being. Open Borders are clearly not the answer to this immigration question, and those activists who advocate no penalty for illegally entering this nation, are totally unrealistic. 5k? seems more than fair to me.