Government in general is so bloated that it should always be subject to cutting. Anyone could go through their town and find dozens of examples of waste.
Tax cuts for the rich: This is a non-starter, because the so-called rich already pay the majority of taxes. Nearly half of all income earners pay no income tax at all. This country does not have a revenue problem, it has a spending problem.
Why is business withholding investment? Simple self preservaion. With the present federal administration there is so much uncertainty in regulation and new imposed costs (Obamacare), business is very reluctant to commit to anything. Try to start a new business, or expand and it is mind boggling to deal with all the permits and environazis that are often over and above governmental hurdles.
In the area where I live, it has become almost impossible for new industries to move in and start up, because of constant court challenges from environmental interests (non-government). I'm all for clean air and water, but it remains a fact that you have to break a few eggs to make an omelet.
Immigration: Not that I believe for one minute that all the people who come to this country--legally, or illegally--come here to work, but many of them do. They will work at jobs that a lot of folks think they can't , or won't do. There are approximately the same number of illegals in this country as there are people who claim to be out of work. It seems like a no-brainer to me that we have too many illegals and not enough hungry Americans. That is, hungry enough to do the work that illegals do.
If austerity is getting rid of duplicate government agencies, meddling and restrictive agencies and making all governments operate from really balanced budgets, put me down as in favor of austerity.