1. Raise prices enough to employ enough humans. I imagine there's quite a few people out there who'd be happy to spend a pint's price on a quality gaming experience.

2. Give the GM better tools. Higher level half-scripted events + better sentiment monitoring. I imagine a single competent GM can run in parallel a bunch of events keeping quite a few players engaged.

3. Recruit experienced players to do this job for you. I imagine there's quite a few people who'd do this job for in-game goods, as long as an hour of GM-ing gives a couple hours worth of grind of goods.