I'll ignore the first point to avoid being re-scolded about discussing something not on the topic of the border in this very specific thread.
The "cost" of illegal immigration is always discussed by the far right but the benefits to our national debt are ignored. We are also the best economy amongst leading nations. Seems strange if we really had this big drag on our economy that we would be trashing all those others who didn't.
The biggest issue with our debt is how they screwed up the SS trust. Well, thanks illegals for propping up our retirement system for us!
Social Security's big immigration problem
However, none of these concerns are major issues for Social Security right now. So what's Social Security's big immigration problem? There isn't enough immigration.
Social Security is funded in part by its two trust funds. The majority of the program's costs, though, are funded by ongoing payroll taxes. This means that the more workers there are in the country, the greater the revenue for Social Security.
A 2019 report from the Bipartisan Policy Center stated, "Immigration strengthens the solvency of the Social Security system by boosting the number of new workers without immediately adding more new beneficiaries." The 2023 Social Security Trustees Report agrees with this, concluding that, "because immigration occurs at relatively young ages," it increases the number of workers well before the number of Social Security beneficiaries increases.
But what about undocumented immigrants who don't pay taxes? This isn't as significant of an issue as it might seem.
The Bipartisan Policy Center noted that all U.S. employers are required by law to verify that new hires have some form of authorization to work. Its report said that many undocumented immigrants "will use a false Social Security number, someone else's number, or a previously valid number when getting a job." As a result, their pay will be subject to FICA payroll taxes. However, they won't be eligible to collect Social Security benefits.
The Center for Immigration Studies acknowledges that it "seeks fewer immigrants but a warmer welcome for those admitted." Even though the organization wants less immigration, its 2023 report stated that "illegal immigration unambiguously benefits" Social Security.