Earlier quoted context omitted.
>They tended to be small and didn’t have the resources to put together reservations (and would have taken months to figure out budgeting situations) This makes no sense. If they can't afford a one-off line item like travel arrangements, how can they possibly make payroll reliably? You're describing either a company with no financial buffer, or one that's asking prospective applicants to subsidize them.
To be honest the DC intern economy runs on rich parents willing to subsidize their kids rubbing shoulders with power.
Once you “make it” then you have your six figure salary and are good to go.
This is by design to ensure the right people get the jobs.