In 1987, Reagan gave amnesty to 3 million illegal Mexicans who, by the way, sponsored another 3 million of their relatives once they became citizens.
You answer your own question. How did Reagan's amnesty stop illegals? It didn't. Amnesty rewards ILLEGAL behavior and begets more illegals.
The illegals are taking entry-level jobs and displacing Americans, including intercity youths and legal low wage & uneducated legal immigrants.
Do a little research at the Center for Immigration Studies:
Tired and Poor: The Bankrupt Arguments for Mass, Unskilled Immigration
by Steven A. Camarota
National Review, September 3, 2001
We at the Center for Immigration Studies estimate that the average Mexican immigrant will use $55,200 more in public services during his lifetime than he pays in taxes.
In California and New Jersey, the average immigrant-headed household currently uses $3,463 and $1,484 more, respectively, in services provided by state and local govern- ment than it pays in taxes. This translates into an added tax burden of $1,178 imposed on each native household in California and $232 in New Jersey (Table 3 on page 7)
Immigration was responsible for 44 percent of the decline in relative wages (com- pared to other workers) for high school dropouts from 1980 to 1994.
Immigration from Mexico: Assessing the Impact on the United States
by Steven A. Camarota
Center for Immigration Studies Paper No. 19
reduction in wages for the unskilled has likely reduced prices for consumers by only an estimated .08 to .2 percent in the 1990s. The impact is so small because unskilled labor accounts for only a tiny fraction of total economic output.
I'm just trying to figure this out.
Do the illegals go armed with guns to the business owners and say… Give me a job? Or do the business owners decide whom they want to hire. Why do you blame the illegals? The business owners are the ones whose greed or desire to make the most of their money lead them to take this path. The more they hire illegals the more illegals you are going to have. It's quite simple, really.