Aater Suleman discusses Gustafson’s law for parallel computing.
There exists workloads that are gaseous in nature: When provided with more compute power, they expand to consume the newly provided power.
Such programs are more common than you think.
1. BitCoin mining. If I give you more compute power, you will not finish sooner. Instead, you will just mine more coins.
2. Graphics. If I give you more compute power, you will just run your frames at a higher resolution or with more details.