Wynn Resorts CEO Craig Billings says Massachusetts’ proposed historic horse racing machines risk weakening the 2011 casino framework by adding competition for customers without the obligations imposed on licensed casinos.

In an editorial published in The Boston Globe, Billings argued that the state’s original arrangement paired a limited number of casino licenses with major private investment, jobs, tax revenue and community payments. Massachusetts authorized three resort casinos and one slots facility under that model; the House later approved an economic development bill amendment that would let horse racing licensees offer historic horse racing machines.

The measure would allow simulcast centers at Suffolk Downs and Raynham Park to operate the machines. It is a legislative proposal, not an authorization already in effect.…