There are a lot of variables here. As the CEO you have to set expectations for how your team members, regardless of equity status, are expected to perform. Startups, just like larger businesses, need to be very clear on job expectations, what makes a success and what doesn't. Ultimately holding equity does not make someone a better worker. If you feel you have created a problem for yourself by allocating equity to partners who do not carry their weight then you hopefully have a buy/sell agreement in your operating or partnership agreement. I've had to do this several times. Some of them didn't go well and some did. I'd be happy to discuss it with you.