"11-20 million illegal aliens"????
Multiply that number by a factor of three or four - or more.
Thanks to Ted Kennedy's Immigration and Nationality Act of 1965 aka "Family Unification Act", each new citizen can then sponsor close relatives. That means immediately bringing in mom, dad, aunt, uncle, et al and if they are old enough or crippled, put them on either Social Security or SDI. Legals are already doing this (personal observation).
Then the politicians will complain that those agencies are going broke sooner than expected and the few remaining workers will have to be taxed more.
Oh, and don't forget, all those above will join the blacks on the Democratic Plantation and vote for them forever.