Companies WILL in some cases do just that, which is exactly what happened last year. Actually, its not only last year, its a cycle that follows this trend:
1) Ram is overpriced
2) Smaller companies start producing more generic ram, ram prices go down
3) Large companies (IE Micron) either buy the small companies, or to drive them out of business, lower their prices forcing the competition to do the same. Micron lowered their prices last year so much, they WERE operating at a loss. However, shortly thereafter, smaller companies went bankrupt cause they had no funding to keep up with micron's cheapass ram.
4) Bigger companies (micron last year) now have much less competition, and raise their prices a lot knowing that people will still buy. This pays for their losses and then some.
5) Go to first.