And citizens benefit from the taxes paid by non-citizen immigrants, whether documented or undocumented. Not just income and payroll taxes that might be dodged by under-the-table arrangements, but sales taxes, property taxes (perhaps paid indirectly via rent to a taxpaying landlord), the consumer share (nearly 100%) of tariffs, etc. And much of that tax base is spent on benefits and services that are not accessible to taxpaying non-citizens.

So from that standpoint, immigrants are a /better/ economic deal for the public than children are. At the end of the day, though, it shouldn't matter where people were born if they're contributing to society, and the grandparent post is 100% correct that the whole debate is stupid.

Sales tax is actually paid by the vendor, they just pass the cost along. The landlord pays the property tax, they just pass the cost along.

It is absolutely impossible for an undocumented alien to meaningfully contribute towards their tax burden in any meaningful way.