[weby]

The short answer: It depends.

The long answer:
Even +150% permanent does not break stuff for some creates, but does for other. Basically it comes down to value. Being able to create something of great value "for free" breaks economies, but creating things that are lower value or equal value to what could be done by spending the time doing something else does not break economies. Basically if the create is limited enough and creates worthless enough stuff it does not break stuff.

Example of not breaking stuff while being useful: One of the PCs in my game has create normal water with permanent and it has never broken anything, but has definitely been useful. Even if they would be in a place with big lack of water and manage to sell the created water for a profit, they could likely do the same thing on a larger scale by transporting in much more water...

But being able to create any liquid with permanent(or long enough to be used) would obviously quickly easily break things when high value liquids would be sold.

I have also allowed alternate way to pay for created stuff in a previous campaign, where a character had a broad create but had to pay for created things by using "reagents". That was to basically buy a generic "value" with money instead of points and the reagents could then be reclaimed the same way that the creation pool is in the normal rules. Thus he did not need the creation pool points, but instead had to have the valuable materials to do stuff.