New entrants, on the other hand, argue that since they cannot economically duplicate the incumbent's local loop, they cannot actually provide certain services, such as ADSL without LLU, thus allowing the incumbent to monopolise the respective potentially competitive market(s) and stifle innovation. They point out that alternative access technologies, such as wireless local loop, have proven uncompetitive and/or impractical, and that under current pricing models, the incumbent is in many cases, depending on the regulatory model, guaranteed a fair price for the use of its facilities, including an appropriate return on investment. Finally, they argue that the ILECs generally did not construct their local loop in a competitive, risky, market environment, but under legal monopoly protection and using taxpayer's money, which means, according to the new entrants, that ILECs ought not to be entitled to continue to extract regulated rates of return, which often include monopoly rents from the local loop.