What are some of the problems with current immigration policy?

One problem with the current US immigration laws are that they are too often circumvented and illegal aliens gain entry to the USA. Another problem is that legitimate applications to enter the USA and obtain a green card takes allot of time. Also, some companies who wish to hire a specific non American citizen are required to post an ad for the job in a major newspaper. This is to provide for a chance for an American to fill the position. The company receives no acceptable resumes (so they say) and proceed to have their immigration lawyer begin the process of bringing the already "picked" job seeker to the USA.