Even if households headed by illegal aliens received $26.3 billion in government services, while paying a total of $16 billion in taxes, that doesn’t necessarily = $10 billion loss if the costs of sealing the border, rounding up everyone and deprting, etc. are more.
According to that argument, we should never enforce any law that costs more than it saves. If somebody breaks into my house and steals $400, then it's clearly more cost-effective for government to reimburse me $400 than to track down, prosecute, and incarcerate the thief.
That is RIDICULOUS.
We will save the money we are spending on freebies for the illegals, leaving us FAR ahead.