The Power & Light District generated $2.2 million in sales taxes last year. The city was expecting $14.1 million, a figure based on a consultant's projection.Photo by Sarah RaeThe consultant, C.H. Johnson Consulting in Chicago, is the subject of this week's column. I asked Charlie Johnson, the company president, to comment about the projection, which looks pretty shaky in practice. His reply is contained in the article.Johnson also e-mailed me a recent Yael Abouhalkah column in The Kansas Ci