The Obama administration announced plans to permit the spouses of certain, "highly-skilled" H1B visa holders the right to work too.
[nytimes.com] The backlog of green-card applications for H1B holders can be as much as 11 years. If the goal is to attract and keep more high-quality talent within the USA (rather than H1B off-shoring
[epi.org]) it seems like stream-lining the green-card process would be more effective. Making the H1B visa a mandatory path to a green card within a very short period, such as 2 years might be a much better way to encourage highly talented individuals to stay in the country compared to requiring more than a decade of uncertainty.