Q:

Why is it usually easier to do things the wrong or unethical way than to do things the right way? 

Jenny Thompson generalized this question from another that I asked earlier, so I thought I'd ask it here. 
I have a few suggested answers on this: 
(But they're probably all wrong)

Some people have more brain power (frontal lobes) than others  (but this kind of relays me back to God in this case for why that would be the case)
Somebody is probably going to say "because the devil is the ruler of this world", in which  case I still have to ask, "well why Did God create him then?" 
Commercialism / Greed has made unethical thought more appealing because of the "short term gains" it provides. 

A:

It's only easier at first to do the wrong thing; but consequences follow and make the way more difficult afterwards.  
Proverbs has a lot to say about wisdom and not going the easy, enticing way.  
There is a way that seems right to a man, 
but in the end it leads to death. ( Prov.  14:12). 

and 
In the paths of the wicked lie thorns and snares, 
but he who guards his soul stays far from them." ( Prov.  22:5)

By contrast,
The path of the righteous is like the first gleam of dawn, 
shining ever brighter till the full light of day. ( Prov.  4:18). 

As to why it is easier for us to do the wrong thing, Paul speaks of the death that reigns over all mankind because of the sinful nature we inherited from Adam:
...sin came into the world through one man, and death through sin, 
and so death spread to all men because all sinned (Romans 5:12)

Our inherited propensity to sin makes it harder to do the right thing.