"The answer they are proposing to the illegal immigration problem is in response to the perceived problem. Which is that the US has not properly enforced our own immigration laws for decades. This being the case, we should examine our immigration laws and determine what changes we should make to them that we would then be willing to enforce. It is rather obvious that we support many more workers coming to the country than we currently legally allow. After such changes are made, and we begin to enforce them properly, we must deal with a massive underground population. An amnesty, then becomes a solution to decades of our neglect to enforce our immigration laws.
Begin to enforce current laws properly, THAT will deal with the massive underground population.
That is certainly one approach. However, millions of illegal aliens over decades informs us that that approach is not supported. One thing is for certain, the status quo is unacceptable.