> Note that the founders interests are aligned with the early employees, they are all taking an equal haircut.
I disagree. The founders definitely have an important stake in the outcome but they stand to get very wealthy if it works out and early employees will - in most cases - make back a premium on the lower wages they took because of stock options (which you should never do) and the extra hours they put in to make the company a success.
Note that simply because of the asymmetry between the potential pay-out the goals are not aligned.
Superficially, yes, they are aligned because if the founders get nothing the employees will also get nothing but employee options are not the same as vested founder shares and employees could easily be 'under water' based on the value of their options being lower than the amount of money they left on the table by choosing this particular employer rather than a more established one.
So for founders the incentive to gamble is much higher (all-or-nothing), in fact I'd argue their goals are roughly the same as early (seed round) investors rather than early employees, once they decide to take on venture capital. The pressure will be on to go home-run-or-bust.
Note that the deal outlined above is exactly one of those. Conservative founders running a profitable business would not gamble like this, but since it doesn't matter any more the only way they will get anything out of this is the home-run and what's good for the employees is no longer relevant to the management that inked this deal (for employees it might actually be better to jump ship at this stage because the 'bust' scenario is a lot more likely with this much pressure than without).