In the comment section to the Q, many of the fellow members feel that "Not voting to lazy voters" is not a right approach. Hence, let's keep this approach away from a general guideline & limited to personal opinion.
Even if we implement such policy hypothetically, that wouldn't solve the core issue of voting. Here are few suggestion, which I practice & are worth discussing.
1. Increase the voter base
If active/passive voters don't want to vote then, increase the people who can vote. On a funny note, this is similar to politicians encouraging for giving easy citizenships, like how it happens: in US for Mexico, in EU for middle east, in India for Bangladesh. :-)
To be able to upvote (good for quantity), 15 rep is required. To be able to downvote (good for quality), 125 rep is required. If some new users get couple of their Q&A upvoted then it will increase their confidence, activity & upvoting power.
In main SO when I joined, I was also a rookie answerer similar to how some new users come and express their thoughts here. However, because of other community members' encouragement, my reputation increased. This led me to learn SO's culture.
We all were new to Hinduism.SE at some point of time and made mistakes & still survived. Let's pass this favour to upcoming users.
This doesn't mean that, we upvote any non-sense & low quality post. Rather, if we feel that user is genuinely trying to answer but doesn't have right tools, then may be we can upvote their post & put a comment if needed. We may also follow this suggestion:
Please stop flagging (instantly) questions/answers as low quality if they are one-liners
Example: for new users I have changed my standards of quality. Hence, I upvoted almost entire posts of this, this, this, this, this, this, this, .. and many many more.
The immediate incentive was that, sometimes I had a good laugh while voting. :D
2. Upvote questions
Let's not downvote the questions easily. While downvoting a Qn, no reputation of -1 happens to the downvoter. But it does affects the asker. Qn is relatively easy & straight forward to improve compared to answer. If you feel like downvoting, then try improving it first.
3 Upvote bounties
Bounties are expensive for those who offer it. Let's at least refill their reputation loss by upvoting their question. There is no loss to anyone. But community gains.
4 Promote site to bring new voters
This completes the circle. Share existing Q&A, which are sensational, shocking, surprising in nature, to your circle using WhatsApp & other such mediums. Nothing wrong in being attention seeker, if it grows community. For example, when some of my circle were informed that according to MahAbhArata, Krishna says "it's ok to lie to a woman while enjoying" or Krishna said that "Had Karna not killed Ghatotkacha, I would have killed him", some of the people were shocked & surprised.
Here is a very limited list of such Q&A: