You raise some excellent points, aRat.
I think the problem isn't with the absence of statistics, but with the communication of the same. I haven't fact-checked the article below, but it presents some interesting data.
American Progress wrote:Immigrants and the economy
The economic impact of immigrants
Immigrants added an estimated $2 trillion to the U.S. GDP in 2016. Immigrants are overrepresented in the labor force and also boost productivity through innovation and entrepreneurship.
In 2010, more than 40 percent of Fortune 500 companies were founded by immigrants and their children. This includes 90 companies founded by immigrants and 114 companies founded by children of immigrants. These companies employ more than 10 million people worldwide.
Over the long run, the net fiscal impact of immigration is positive. From 2011 to 2013, children of immigrants contributed $1,700 per person to state and local budgets, and immigrants’ grandchildren contributed another $1,300. Across three generations, immigrants’ net contribution, per person, was $900.64
Research shows that immigrants complement, rather than compete with, U.S.-born American workers—even lesser-skilled workers. Researchers such as Ethan Lewis, Will Somerville, and Madeleine Sumption find that U.S.-born workers and immigrants have different skill sets and tend to work in different jobs and industries, even when they have similar educational backgrounds. Immigrants tend to complement the skill sets of American workers, thus enhancing their productivity.
The impact of immigration on the wages of U.S.-born individuals is small but positive over the long run. Economist Heidi Shierholz estimates that from 1994 to 2007, immigration increased average wages of U.S.-born individuals 0.4 percent, or $3.68 per week. Immigrants consume goods and services, creating jobs for natives and other immigrants alike. These results are consistent with those of other studies by economists such as David Card, Gianmarco Ottaviano, and Giovanni Peri.
Immigration also appears to have a minimal impact on average African American wages and employment. The work of scholars such as Lonnie Stevans, Robert LaLonde, Robert Topel, Franklin Wilson, Gerald Jaynes, and David Card suggests that immigration had little effect on the wages and employment of African American men between 1960 and 2010, regardless of their level of education.
As Baby Boomers retire en masse over the next 20 years, immigrants will be crucial to filling these job openings and promoting growth of the labor market. From 2020 to 2030, 7 million U.S.-born individuals, on net, are expected to leave the labor force. 2 million immigrants and 6.9 million children of immigrants are projected to join the labor force during the same period. Looking further, from 2015 to 2065, immigrants and their descendants are expected to account for 88 percent of U.S. population growth. As such, immigrants and their children will be critical both in replacing retiring workers—preventing labor market contraction—and also in meeting the demands of the future economy.
Source: https://www.americanprogress.org/issues ... 7-edition/