At start-ups the concept that employees are taking no risk is just laughable on its face.
At start-ups the concept that employees are taking no risk is just laughable on its face.
The founder has likely foregone salary altogether for some time and run up personal debts while doing so. They've probably tipped a lot (relative to their net worth) of initial capital into the company to get it off the ground. If everything goes wrong, they need to go find a job _and_ deal with the mountain of debt they're now in.
If the company is at a stage where it has paid employees, a significant part of the risk of failure has already passed. There's plenty more risk to come, but you cleared the first few hurdles; and they're big ones.
Source: Founder that did all that stuff.
However, I would caution you that "racking up debt" isn't something only founders have as a risk. What you've described in your second paragraph is where just about anybody who isn't rich or well connected and has to rack up debt going to college finds himself, at least in the US. I would also caution you that employees frequently cannot merely walk out the door of the failed start up and into a paycheck across the street (as it were). They have to spend time, and their own savings, looking for work, in most places.
Compounding this is that odds are said founder has accumulated something the fresh college graduate or now former-employee hasn't: connections and the ability leverage his 'failure' into lucrative employment or future business opportunities. This helps mitigate the risk significantly.
If a Founder is working for equity in a company for 18 months and it dies, it's an absolute personal disaster. There's no way to repeat that four times in a row and remain solvent and sane.
This simple example shows the fact that really it doesn't matter whether a company really guarantees an employee a paycheck or not. If it has enough money to pay you for a few months, you're good to start.
There are mergers and acquisitions in companies of all sizes, so to some degree no jobs are safe.