i've done a little research. underground economy definitely has increased. partly due to the recession. no idea if people involved will find working underground a way of life and continue or after economy improves move above ground. it seems there is no real incentive to move above ground for some, because if moving above mean taxes and reduced pay for the same work, they may not be able to afford a pay cut.
http://www.usnews.com/news/blogs/rick-newman/2013/03/18/the-new-underground-economyquote from link above: Authorities in California say off-the-books transactions cost the state $6.5 billion in lost tax revenue every year.
fair amount of this 6.5B from illegal immigrant economic benefit i guess. it seems a lot for hospitals and schools to be doing without. 6.5B every year. so while they collect pay off books, they show up at the hospitals and schools on the books. i wish i knew how that economic benefit was calculated especially in cases where the restaurant that hires legal residences goes out of business while the one that hires illegal immigrants thrives. carry this example to auto repair, drywall, plumbing... etc. i really would like to see that calculation.
http://moneymorning.com/2013/04/29/what-americas-2-trillion-underground-economy-says-about-jobs/this article has related links at the bottom.
from above link: "The Internal Revenue Service estimated that the losses from unreported wages have grown from about $385 billion in 2006 to about $500 billion last year.
State governments lose another $50 billion to the overall underground economy.
That means the people who play by the rules are getting a raw deal.
here is a website seemingly dedicated to the idea of cash jobs:
http://livesafely.org/ there are lots of articles and lots of stated numbers on the internet so i won't soak you in them. my concern has always been - what if they work in underground economy forever and have no ss when they need it? never mind that question, it won't be answered until today's internet generation start to retire. i still think gov't has a responsibility to educate/warn people about the impacts of working underground and to focus that toward the younger folks. it really is easier than ever to make a living underground.
Here is a comment I found on underground article - 100k is way high but i get what he is getting to:
Example – wife cleans two homes a day and husband moves four lawns a day = $100,000 a year in cash – no taxes. Additional benefits: food stamps, housing assistance, free school lunches. Weekends on fleat market for additional cash. Driving Escalates. What a country!