Boss not sticking to our agreement

[Harry Maxwell]

I work for a small start-up company, and agreed to a package where I would get a really low base salary and a percentage of the business revenues. Problem is, the business isn't doing very well, and that's being used as an excuse to not pay me a revenue percentage. From my calculations, the share I should be getting isn't much at the moment, but it's making me think - if my boss isn't willing to pay me this small amount now, is he going to be willing to pay me a large amount when business does pick up? I'm thinking maybe I should just walk away now instead of setting myself up for a big disappointment later...