MBS charges higher prices for non-proprietary parts compared to other vendors, creating fundamental tension between MBS's profitability needs and Beacon's budget accountability. The "right hand, left hand" argument — that Beacon profits regardless of which pocket the money lands in — does not resolve practical budget impacts for individual managers. This pricing disconnect has damaged the business relationship, limited parts purchasing to only proprietary Thomas parts, and created lasting trust issues. Beacon increasingly sources from alternative vendors, reducing MBS revenue and collaboration opportunities.