MB centre ignored my input into the situation
Although they should have answered your call, what were you expecting them to do?
G is see & avoid airspace, you said you saw him on his departure call & were in comms with the other aircraft.
If you are VFR in G, ATC are not going to take positive control over you. I'm struggling to see the actual point of your argument (beyond not getting a "roger" answer), it sounds like you've just got the sh*ts wth ATC.
The gadgetry, Im assuming you mean radios, transponders, mode-s (ADSB) etc. Is all designed around increasing safety. (no different to seatbelts, airbags, ABS in cars). The more ATC can see the better the service. What price safety?
In the UK its mandatory for most aircraft to have at least mode-s elementary (and Ive seen aircraft made with just newspaper & badger spit carry it)
http://www.caa.co.uk/docs/810/gen.pdf
If its expensive then its the suppliers you should be griping at not CASA. Mode-s is far superior to radar - more accurate, cheaper to install & maintain (ATC side).
And if it wasnt for all the nay sayers it would have been implemented much sooner and it would all be second nature to everyone, and would not be looked at any differently to radios or engines. Dont be so resistant to good change.