My own experience has been background checks always. Work with military data was by far the most extensive (required approved clearance). Government positions

My own experience has been background checks always. Work with military data was by far the most extensive (required approved clearance). Government positions were the most varied, with one being very thorough (not quite as bad as the military), and an other being the least intensive. Financial institution were middle of the road. But everywhere where I had database access required a background check and only one place didn't require a drug test. The lower income positions I worked required neither. One thing I did notice from my friends is that smaller shops are less likely to have institutionalize policies. A small startup is less likely to background check you than a fast food chain likely has a policy requiring it. But this applies to any large organizations, not just lower income positions.