"We're very fortunate to have a talented pool of people but the downside is that everyone wants to come in and buy them," Hansen said.
"It's the old adage, we want to develop one but we have to develop four - one for us and one for each of those other environments.
"It hasn't got to the point where it's disastrous - the contracting people are doing a magnificent job and the rugby union are supporting us magnificently, and there's (still) a massive desire to keep pulling on the black jersey.
"While that's there, we'll keep coming out on top on the talent side."
Hansen admitted that, based on the current global market, his Test-level players could do with a pay rise but said it would be hard to deliver.
New Zealand Rugby have already agreed to tip an additional $70 million into player payments through to 2019 as part of their collective agreement.
That pool also includes $25 million for the retention of key All Blacks.
"There has to be a reality at some point, what can we afford and what can't we afford? We're not a big country, how do we raise that money?" Hansen said.
"Everyone thinks New Zealand Rugby has all this money - well it doesn't (and) we've got to fight for every dollar we get and spend it wisely."
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- AAP