That has been discussed ad nauseam in many threads here. First, if the existence of the Migrant Farm Workers program were considered sufficient to the desires of American Capital, we wouldn't be here now would we? Oh by the way, our entire ex-border unauthorized immigrant problem at the Southern Border is now relegated to asylum seekers from three small Central American countries that we have been frigging up beyond all recognition for over a century. ...snip
Ignoring your ancillary swipes at Republicans, your proposal could be considered moderate and reasonable - not unlike the prior moderate and reasonable customs and border control policies of the past. But also like them, they are unserious and proven ineffective. And if human beings honored reason more than they do their gut feelings, it wouldn't be necessary to point out the obvious ad nauseam.
So, once more:
First, no "desire of American capital" can be satisfied as long as the average wages in the US is significantly higher than its immediate neighbors. "Desires" for less expensive labor is as natural as desires for less expensive televisions - if you want them and can get them (even illegally), you will. In other words, you failed to note that "sufficiency" as a goal does not exist in a vacuum. Their actual desire (want) is for "Sufficiency at the lowest possible cost" WHICH is why people employ illegals in ag, day labor, nannies, and kitchen help.
Second, yes the Migrant Farm Worker program is "insufficient" for getting the lowest possible cost of labor for one major reason: it requires that the employer show proof of, and provision for, the worker's housing, worker's comp, medical care, etc. It is a lengthily process that is more expensive than hiring an illegal off the back of a truck. However, for those willing to pursue it, it does provide the sufficient labor wanted at rates lower than what they would have to pay a non-immigrant for the same work.
Third, border security and regulated migration are different in that you must have the first to have the second. As long as you have up to half million crossing illegally successfully, you can't have a immigration system that regulates who does and does not enter the country.
Four, the current system does not work. Illegal immigration continues, from illegal border crossers to violation of the terms and conditions by VISA users. Violators, if not caught near the border, disappear within the population, often in protected asylum havens. As a practical matter, the few caught deep inside the US are, in practice, largely immune to deportation. The border is so porous it is not unusual to find illegals that repeatedly return to the US after leaving the US on numerous occasions.
THEREFORE, after nearly 50 years of repeated failure to create a "reasonable" and "moderate" border and visa control another proposal of "half-baked" and "half-hearted" choices , such as yours, is not credible nor rational - more of the same tepid semi-action that keeps dodges ALL of the above reasons for prior failure is embracing empirical failure as your benchmark.
Why, like many, you are unable to consider the most SERIOUS and ROBUST border and VISA control is as mysterious as it is obtuse.
After 50 years of "half-baked" actions and "full-baked" protection of illegals you might try the reverse; otherwise you're just pissing on our shoes and telling us its raining.