Don't Be Fooled...
...By the line that supply is high and they are cutting production to control prices. Pioneeer doesn't have that high of market share to control supply. If demand is there someone else will pick up the slack.
IMO there are two issues here. The main issue is they are cutting cost as they are not profitable. This overrides all other speculation or "Press Releases" as to cutting production to control prices. The FT article talks more about profitability and cutting cost than controlling prices. Pioneer is not making money and are cutting cost. Period. And this has nothing to do with quality over quantity.
The second issue is their business decision to only produce PDP and not venture in to LCD production. Pioneer is a small company compared to Sony, Samsung, LG, etc. so they made the business decision a long time ago to focus on PDP. With their limited resources this was a sound decision. But LCD TV's are cutting into PDP market share and providing competition for the entire television market, which drives down prices on all ends. Pioneer is just doing what all good companies do when profitability is down, they cut costs.