Security implementations are different within each agency and each site. It's usually up to a particular individual on the site on how stringent or relaxed they want to make it. The employees are a mix of Civil Service (GS & SES) and contractors of all income and education levels. Always up to those responsible for the facility to make that call. I spent years of my life going through two armed guard checkpoints, 2 badge access doors, one being a vault and sitting at a desk with 3 cameras locked on me.
As for Civil Service employees being lazy... well just like within any profession you have top notch individuals, and the bottom of the barrel types just riding the position until retirement. No different than any industry, I will say private industry is usually more fiscally responsible and often do cyclic removal of employees. My company did this 2 months ago, 6 months before that and 6 months before that which totaled about 15% of the company workforce.