Well, no one in their right mind would want to wear pleated jeans. Your best option is to stop wearing jeans if they fit you that poorly, or to move onto another style. For instance, Levi's 501s might be a classic, but the other styles they produce have different waist-to-hip ratios. I buy some kind that has roomier legs because it's the tight thighs that bug me the most. The waist is a little higher than most jeans on the market today, but so is my waist. It's at the top of my pelvis, like it should be on a guy with an ass.
Then again, perhaps your problem is not with the pants, but with your ass. What have you been eating lately?