In general, taxes levied on the public are a very crucial source of government revenue. Without the needed funds, the county cannot fund important services such as the fire departments, police, hospitals, schools, and even parks. This is why tax lien certificates are sold to the highest bidders in order to obtain the funds.
Tax lien certificates provide investors high returns on their money. Investors can get as high as 24% in interest rates as well as other penalties, and fees from the tax delinquent homeowner. They may even get the full title to the property if the owner fails to pay, and it ends up being foreclosed.