I believe it will create jobs. If a 10 million people immigrate and employment among citizens drops by 2 million jobs while 2.1 million immigrants get jobs, then it created jobs.
Unemployment as a percentage of the population or workforce may have risen. Unemployment as an absolute number and as a percentage among citizens will have risen. The standard of living among citizens or the entire population may have fallen. But jobs were created.
Nobody says they’ll be American jobs.
To pay for anything with welfare wages the norm, they’ll be buying more garbage from slave laborers in overseas factories.