Its not really.
The first couple of years the aim was reduce the wage bill and age of the squad, get rid of the high earners and bring in young hungry players on low money who could develop and increase in value. That way the wage bill decreased and the basis of a squad was in place to build upon once the finances were sorted.
This summer would have seen Lambert backed to build on the cheap young squad with a small number of higher priced better quality players. Only he changed his mind, or never intended to see the second half of the plan through.
Lambert is then left with a tiny transfer pot and the choice of buying cheap young players again, or saving on transfer fee's and going for more experienced better played players.
I think he has recognised that more young, inexperienced players would be something we couldn't cope with, so in the absence of being able to buy experienced players he is utilising the Bosman market.
I really don't see it as being a change in transfer policy from Lambert but rather a complete u-turn by Lerner meaning that Lambert is having to adjust and make the most of a pretty bad hand.
So Lerner didn't plan on selling the club a couple of seasons ago and the plan really was to sort us out financially before starting again?