I agree with what you said about our "welfare state." Legal immigrants (technically, their spouses) have to pay back any means tested benefits, while employers and others lobby for whatever illegal immigrants can get from the system. And legal immigrants probably don't take much in the way of means tested benefits at all.
Multiculturalism also costs us. If companies want to hire people who speak other languages and have other cultures, those companies should foot the bills for education--not the federal government. It's not about color, but it is about the economy. There are quite a few employers in my area that are paying Mexican national men about $15 per hour (give or take, here and there) to do construction labor, but they refuse to hire local citizen young men because of matters of personal vanity. They want to have submissive attitudes and the code of silence around them more than they want money.
Multiculturalism isn't really fair, IMO. For a change, inviting people who could pass tests in English, pro-American History and allegiance wouldn't be too much to ask.
And someone should really be listening to you on Homeland Security. You have the experience to know a few things about organization and tactics in your end of the work. Congress does have a lot to do with messing all of those things up, though--DHHS, DHS, all, for money to the states.
The President said that he will sign either the House or Senate bill. If you want to hold one of those bills together in Congress and get it passed, follow the link, learn, and do it.
http://thomas.loc.gov/