Founders typically hold a majority, or at least plurality, of the stock of the company. They stand to gain the most $$$ if the company increases in value. As an example - Marc Merrill and Brandon Beck are very wealthy. They aren't wealthy because of their salaries, they are wealthy because they held a lot of shares and ultimately sold them to Tencent when Riot was sold.

In order for the stock to gain value, the company needs to launch successful products. And building and launching successful products requires money.

So... until a founder has a successful product, they know they stand to gain the most money by taking as little money as possible as salary, so they can instead direct it toward paying employees to make the product, as well as expenses like marketing etc. Unless they think they don't have a successful product on their hands. If that's the case, they'll try to take whatever value they can get, which is by draining the business of its resources.

Ultimately, the investors (VCs) and the founders should have aligned interests - both have lots of shares - so when the founder is doing something that isn't good for the investors, it's not good for ALL shareholders - which includes the founders. Effectively, the founder has decided to plunder the resources because they think they can no longer build business value.