He will though: not financial backing, but time backing. They wont want to change managers. RM is a safe pair of hands. They know he can get his team to win games. They merely want to stay in the PL. That's it. Full stop. Change to someone else and they are into the unknown. They dont want that.
100% guaranteed: RM's job is safe for as long as he wants it.
Lukaku £28m, McCarthy £13m and potentially Yarmolenko for £15m means that Roberto has been given money to spend. And he's (so far) been allowed to keep his biggest assets in the face of intense interest from other clubs.
We're not going to gamble millions of pounds but that's sound business sense. Who would make way for new signings anyway? Coleman, Stones, Jagielka, Baines, McCarthy, Barkley and Lukaku are certainly undroppable. Deulofeu will hopefully step into that bracket and Mirallas is one of our best players on his day. Howard and Barry are favourites of the manager, so that's all eleven places taken.
Martinez's 'golden generation' project really appeals to me. If we can keep picking up high-quality players under the age of 23 (Stones, Lukaku, Deulofeu) and keep bringing exciting players through the academy (Barkley, Galloway, Browning, Garbutt) and get them playing passing football, then they should all peak in about another 4 years and we can benefit from that for a number of seasons. Isn't that the Barca model?