For the history of Prop 13 and why it was passed through the voter initiative process as an amendment to the California state constitution, read the link:
http://www.ask.com/wiki/California_Proposition_13_(1978)
As noted in the article, Proposition 13 drew its impetus from 1971 and 1976 California Supreme Court rulings in Serrano v. Priest,Serrano[›] that a property-tax based finance system for public schools was unconstitutional. The California Constitution required the legislature to provide a free public school system for each district, and the Fourteenth Amendment of the United States Constitution (which includes the Equal Protection Clause) required that all states provide to all citizens equal protection of the law. The court ruled that the amount of funding going to different districts was disproportionately favoring the wealthy.
Previously, local property taxes went directly to the local school system, which minimized state government's involvement in the distribution of revenue. This system also allowed a wealthier district to fund its schools with a lesser tax rate than the rate a less affluent district would have to set to yield the same funding per pupil. The Court ruled that the state had to make the distribution of revenue more equitable. The state legislature responded by capping the rate of local revenue that a school district could receive and distributing excess amounts among the poorer districts. As a result property owners in affluent districts perceived that the benefits of the taxes they paid were no longer enjoyed exclusively by the local schools.
The idea of local control of government and taxation has been replaced by the nanny state where the state and federal governments dictate revenue sources and revenue expenditures to "level" the playing field. That is the driving force behind Obamacare and other government mandated programs.
California passed the Amazon tax in the name of fairness to local brick and motor stores, while exempting eBay sales up to $500,000 for its participants (eBay is located in Silicon Valley). The problem is, the tax applies if Amazon has affiliates - companies that link to Amazon (ad revenue) or receive compensation for providing services to Amazon. Amazon has responded by firing and terminating all businesses that are located in California.
The perverse effect of the Amazon tax is that in hope of generating $200 million in additional sales tax revenue, California will lose $500,000 in income tax revenue from those affiliates that were terminated.