Just about the same amountas the state is losing to illegals paid under the table.
I can understand metrics used to calculate the cost illegal aliens have on CA services; $4.5bil/yr K12 schooling; $1.4 prisons; $1.4 medical or about $7-8bil/yr.
I don’t understand the metrics being used to determine the size of an underground economy.
FWIW, I would suspect the homosexual community underground economy to be far greater. The homosexual mindset has been honed to behave without being held accountable to public law, while working to change established institutions to their personal behavioral desires. With 2 income households, they have far greater expendable income than most heterosexual families, so they tend to hide much greater percentages of their income in other properties and they hate being taxed. If anything, they perceive their higher tax rates to be a public form of bigotry against their ‘lifestyle’.
CA homosexuals tout their numbers in CA at over 1.3mil, however some studies find the illegal population in CA to be around twice that number at 2.6mil ( http://www.ppic.org/content/pubs/report/R_711LHR.pdf ). The reported incomes of homosexual partnerships tend to be twice that of heterosexuals and the investment portfolios of homosexuals may increase by nearly an order of magnitude.
Considering the illegal population is more likely to be lower wage earners, it might not be more advantageous economically to further tax that underground economy more than say the homosexual community and its vast underground investment portfolios.
IMHO, the better bang for the buck is to go after the homosexual community to pay their fair share instead of racially discriminating the Latino community.
From the study above, the illegal immigration communities may be far greater in the Asian than Latino communities in more affluent areas.