If you are entering into a covert arrangement to divert proceeds due to the US Postal team from sale of assets (expensive pedigreed bicycles) to fund a doping program the objective is not to disclose them in the team's financial accounts.
Bruyneel claims the team's budget in one particular year was $18m. If they had to sell 50% of the 120 bikes extremely early in the season could the reason be the bean counters erred by underestimating the budget to negotiate sponsorship funds and the team was strapped for cash at an early date?
The incident when Floyd Landis discovered that 60 bikes could not be accounted for happened in March 2004 (Paris-Nice race). A very early date in the season for a team already having to fund unbudgeted team expenses.
Or the costs of the team doping program could not form part of the budget and therefore had to be financed through devious and undisclosed backdoor measures?
Tailwind Sports is a US corporation (incorporated in Delaware) that is assessable in the US on its world wide income less tax credits for foreign taxes paid. Income is not exempt from tax because it is sourced outside the US.
Read this
WSJ articlewhich is clear from the persons interviewed that it was the team selling the bikes.
If the riders were getting a benefit from the sales proceeds it would have been put up as a defense. Riders Landis and Clinger then would have no grounds to complain they could not be provided with better bikes.